Academic literature on the topic 'Univariate and multivariate analysis'

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Journal articles on the topic "Univariate and multivariate analysis"

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Huberty, Carl J., and John D. Morris. "Multivariate analysis versus multiple univariate analyses." Psychological Bulletin 105, no. 2 (1989): 302–8. http://dx.doi.org/10.1037/0033-2909.105.2.302.

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Ramasamy, Padma, Kalaivani Amitkumar, and Sundaresan Sivapatham. "Evaluation of Prognostic Factors in 198Buccal Mucosa Cancer Patients: Univariate and Multivariate Analysis." Indian Journal of Pathology: Research and Practice 6, no. 4 (Part-2) (2017): 1061–66. http://dx.doi.org/10.21088/ijprp.2278.148x.6417.40.

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Flury, Bernhard K., and Hans Riedwyl. "Standard Distance in Univariate and Multivariate Analysis." American Statistician 40, no. 3 (August 1986): 249. http://dx.doi.org/10.2307/2684560.

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Hillmer, Steven C., and William W. S. Wei. "Time Series Analysis: Univariate and Multivariate Methods." Journal of the American Statistical Association 86, no. 413 (March 1991): 245. http://dx.doi.org/10.2307/2289741.

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Flury, Bernhard K., and Hans Riedwyl. "Standard Distance in Univariate and Multivariate Analysis." American Statistician 40, no. 3 (August 1986): 249–51. http://dx.doi.org/10.1080/00031305.1986.10475403.

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Chuang, Alice. "Time Series Analysis: Univariate and Multivariate Methods." Technometrics 33, no. 1 (February 1991): 108–9. http://dx.doi.org/10.1080/00401706.1991.10484777.

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Eysenck, H. J. "Effects of smoking: Univariate or multivariate analysis?" Contemporary Psychology: A Journal of Reviews 38, no. 7 (July 1993): 759. http://dx.doi.org/10.1037/033567.

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Lai, T. H. "Time series analysis univariate and multivariate methods." International Journal of Forecasting 7, no. 3 (November 1991): 389–90. http://dx.doi.org/10.1016/0169-2070(91)90015-n.

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Roy, Dilip, and S. P. Mukherjee. "Multivariate Extensions of Univariate Life Distributions." Journal of Multivariate Analysis 67, no. 1 (October 1998): 72–79. http://dx.doi.org/10.1006/jmva.1998.1754.

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Jaffard, Stéphane, Stéphane Seuret, Herwig Wendt, Roberto Leonarduzzi, and Patrice Abry. "Multifractal formalisms for multivariate analysis." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475, no. 2229 (September 2019): 20190150. http://dx.doi.org/10.1098/rspa.2019.0150.

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Multifractal analysis, that quantifies the fluctuations of regularities in time series or textures, has become a standard signal/image processing tool. It has been successfully used in a large variety of applicative contexts. Yet, successes are confined to the analysis of one signal or image at a time (univariate analysis). This is because multivariate (or joint) multifractal analysis remains so far rarely used in practice and has barely been studied theoretically. In view of the myriad of modern real-world applications that rely on the joint (multivariate) analysis of collections of signals or images, univariate analysis constitutes a major limitation. The goal of the present work is to theoretically ground multivariate multifractal analysis by studying the properties and limitations of the most natural extension of the univariate formalism to a multivariate formulation. It is notably shown that while performing well for a class of model processes, this natural extension is not valid in general. Based on the theoretical study of the mechanisms leading to failure, we propose alternative formulations and examine their mathematical properties.
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Dissertations / Theses on the topic "Univariate and multivariate analysis"

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Zhou, Feifei, and 周飞飞. "Cure models for univariate and multivariate survival data." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45700977.

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Ley, Christophe. "Univariate and multivariate symmetry: statistical inference and distributional aspects." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210029.

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This thesis deals with several statistical and probabilistic aspects of symmetry and asymmetry, both in a univariate and multivariate context, and is divided into three distinct parts.

The first part, composed of Chapters 1, 2 and 3 of the thesis, solves two conjectures associated with multivariate skew-symmetric distributions. Since the introduction in 1985 by Adelchi Azzalini of the most famous representative of that class of distributions, namely the skew-normal distribution, it is well-known that, in the vicinity of symmetry, the Fisher information matrix is singular and the profile log-likelihood function for skewness admits a stationary point whatever the sample under consideration. Since that moment, researchers have tried to determine the subclasses of skew-symmetric distributions who suffer from each of those problems, which has led to the aforementioned two conjectures. This thesis completely solves these two problems.

The second part of the thesis, namely Chapters 4 and 5, aims at applying and constructing extremely general skewing mechanisms. As such, in Chapter 4, we make use of the univariate mechanism of Ferreira and Steel (2006) to build optimal (in the Le Cam sense) tests for univariate symmetry which are very flexible. Actually, their mechanism allowing to turn a given symmetric distribution into any asymmetric distribution, the alternatives to the null hypothesis of symmetry can take any possible shape. These univariate mechanisms, besides that surjectivity property, enjoy numerous good properties, but cannot be extended to higher dimensions in a satisfactory way. For this reason, we propose in Chapter 5 different general mechanisms, sharing all the nice properties of their competitors in Ferreira and Steel (2006), but which moreover can be extended to any dimension. We formally prove that the surjectivity property holds in dimensions k>1 and we study the principal characteristics of these new multivariate mechanisms.

Finally, the third part of this thesis, composed of Chapter 6, proposes a test for multivariate central symmetry by having recourse to the concepts of statistical depth and runs. This test extends the celebrated univariate runs test of McWilliams (1990) to higher dimensions. We analyze its asymptotic behavior (especially in dimension k=2) under the null hypothesis and its invariance and robustness properties. We conclude by an overview of possible modifications of these new tests./

Cette thèse traite de différents aspects statistiques et probabilistes de symétrie et asymétrie univariées et multivariées, et est subdivisée en trois parties distinctes.

La première partie, qui comprend les chapitres 1, 2 et 3 de la thèse, est destinée à la résolution de deux conjectures associées aux lois skew-symétriques multivariées. Depuis l'introduction en 1985 par Adelchi Azzalini du plus célèbre représentant de cette classe de lois, à savoir la loi skew-normale, il est bien connu qu'en un voisinage de la situation symétrique la matrice d'information de Fisher est singulière et la fonction de vraisemblance profile pour le paramètre d'asymétrie admet un point stationnaire quel que soit l'échantillon considéré. Dès lors, des chercheurs ont essayé de déterminer les sous-classes de lois skew-symétriques qui souffrent de chacune de ces problématiques, ce qui a mené aux deux conjectures précitées. Cette thèse résoud complètement ces deux problèmes.

La deuxième partie, constituée des chapitres 4 et 5, poursuit le but d'appliquer et de proposer des méchanismes d'asymétrisation très généraux. Ainsi, au chapitre 4, nous utilisons le méchanisme univarié de Ferreira and Steel (2006) pour construire des tests de symétrie univariée optimaux (au sens de Le Cam) qui sont très flexibles. En effet, leur méchanisme permettant de transformer une loi symétrique donnée en n'importe quelle loi asymétrique, les contre-hypothèses à la symétrie peuvent prendre toute forme imaginable. Ces méchanismes univariés, outre cette propriété de surjectivité, possèdent de nombreux autres attraits, mais ne permettent pas une extension satisfaisante aux dimensions supérieures. Pour cette raison, nous proposons au chapitre 5 des méchanismes généraux alternatifs, qui partagent toutes les propriétés de leurs compétiteurs de Ferreira and Steel (2006), mais qui en plus sont généralisables à n'importe quelle dimension. Nous démontrons formellement que la surjectivité tient en dimension k > 1 et étudions les caractéristiques principales de ces nouveaux méchanismes multivariés.

Finalement, la troisième partie de cette thèse, composée du chapitre 6, propose un test de symétrie centrale multivariée en ayant recours aux concepts de profondeur statistique et de runs. Ce test étend le célèbre test de runs univarié de McWilliams (1990) aux dimensions supérieures. Nous en analysons le comportement asymptotique (surtout en dimension k = 2) sous l'hypothèse nulle et les propriétés d'invariance et de robustesse. Nous concluons par un aperçu sur des modifications possibles de ces nouveaux tests.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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McGeehan, Lawrence T. "Multivariate and Univariate Analyses of the Geographic Variation within Etheostoma Flabellare (Pisces: Percidae) of Eastern North America." Connect to resource, 1985. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1218739588.

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Lee, Jessica. "Evaluating Restoration Success of a Southern California Wetland Comparing Univariate Analysis to Multivariate and Equivalence Analyses." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10752347.

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Loss of wetland habitat and their associated services and functions during the past century has been extensive. As a solution, managers have turned to restoration, but even regionally, researchers lack agreement on monitoring criteria and analytical methods for defining restoration success. This study investigated the recovery trajectory of two recently restored wetlands in southern California as compared to a reference site using univariate, multivariate and equivalence analyses. Important abiotic and biotic parameters in the two restored marshes, such as salinity and invertebrate abundance, were equal or higher than the reference marsh using traditional simple hypothesis-based statistics like ANOVAs, indicating potential restoration success after 4 years. However, invertebrate community composition remained significantly using multivariate analysis. Inequivalence tests (an interval-based approach with reversed null hypothesis) indicated fewer parameters achieved restoration success, representing a more conservative approach. Overall, this demonstrates the need for long-term comprehensive monitoring that includes novel approaches to statistical analysis.

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Stevens, James G. "An investigation of multivariate adaptive regression splines for modeling and analysis of univariate and semi-multivariate time series systems." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/26601.

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Acres, Daniel Nigel Gerard. "The behaviour of style anomalies in worldwide sector indices : a univariate and multivariate analysis." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/8909.

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The aim of this thesis is to explain the cross-section of International Classification Benchmark (ICB) level 4 (sector) index returns. A worldwide study of 48 developed and emerging countries is conducted, considering up to 38 sector indices per country. In cluster and factor analyses of the sector returns all the developed markets are found to cluster together, as are the emerging markets, suggesting diversificationary benefits from investing across the two. The one-month-ahead return forecasting power of 35 sector-specific attributes is investigated over an in-sample period from 31 January 1995 to 31 December 2001 and an out-sample period from 31 January 2002 to 31 December 2005. The data is adjusted for look-ahead bias, outliers, influential observations and non-uniformity across markets. Monthly sector returns are cross-sectionally regressed on the attributes in a similar fashion to Fama and MacBeth (1973). Sector returns are considered both before and after risk adjustment with the Capital Asset Pricing Model (CAPM), the Arbitrage Pricing Theory (APT) model and Solnik's (2000) version of the International CAPM (ICAPM). The ICAPM is found to be the best performing model but, in general, the evidence does not support covariance-based models of asset pricing. Nine attributes are found to be significant and robust over the two sample periods namely cash earnings per share to price (CP), dividend yield (DY), cash earnings to book value (CB), 6 and 12-month growth in cash earnings, to price (C-6P & C-12P), 12 and 24-month growth in dividends, to price (D-12P & D-24P), the payout ratio (PO) and 12-month prior return (MOM-12). All the significant attributes from the univariate regression tests are found to payoff consistently in the positive direction when tested with the nonparametric Sign Test. Nine of the significant attributes namely book value per share to price (BP), dividend yield (DY), earnings yield (EY), 6-month growth in cash earnings, to price (C-6P), cash earnings to book value (CB), 24-month growth in dividends, to price (D-24P), 24-month growth in earnings, to price (E-24P), 12-month and 18-month prior return (MOM-12 & MOM-18) are also found to have significantly low frequencies of changes in payoff direction when assessed with the nonparametric Runs Test. Seven style timing models are developed, all of which produce significantly accurate payoff direction forecasts for most of the significant attributes. The timing models are however generally inaccurate in forecasting the magnitude of the payoffs. Very little seasonality is observed in the payoffs to the significant attributes. Two sets of seven 'stepwise optimal' and 'control' multivariate models are constructed from the significant univariate in-sample attributes in order to forecast the payoffs to the factors in a controlled multifactor setting. The stepwise optimal models are derived from a stepwise procedure, whilst the 'control' models comprise all the attributes which are found to be significant in one or more of the 'optimal' models. The forecasting power of the all the models is found to be below an exploitable level; of the 'control' models the single exponential smoothing model is the most accurate outsample performer. Weighted Least Squares (WLS) models are used to allow for the possibility of heteroskedasticity, which may exist in the cross-section of worldwide sector returns. The WLS models are ineffective in improving forecasting power when the inverse of the 12-month rolling standard deviation of the residuals is used as the weight series.
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ARAÚJO, Adalberto Gomes de. "Comparação entre métodos univariados e multivariados na seleção de variáveis independentes, na construção de tabelas volumétricas para Leucaena leicocephala (Lam) de Wit." Universidade Federal Rural de Pernambuco, 2005. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4450.

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The objective of this work was to use multivariate and univariate statistical methods, in the selection of independent variables, in mathematical models, in the construction of volume tables for Leucaena leucocephala, looking for reduction in time and costs, without loss of precision. The data came from an experiment carried out at the Experimental Station of the Institute of Agriculture Research (IPA), Caruaru-PE. It was used 201 trees of leucena that had their volumes (dependent variable) measured by the method of Smalian, and 20 variables independent measured in the same trees. For the selection of the independent variables the following methods were used: Principal Components, Cluster Analysis, Maximum and Minimum R2, Stepwise, Forward, Backward and Criterion of Akaike. In the general, the univariate and multivariate methods used in the selection of independent variables for volume models, showed similar responses, even though they had different structures in relation to the independent variables, since the number of those variables is high. Besides the applied statistical tests, the researcher'sjudgment about the relevance of the selected independent variables in the final equations has a great importance, mainly, in the reduction of costs and sampling errors.
O objetivo deste trabalho foi utilizar métodos estatísticos univariados e multivariados na seleção de variáveis independentes, em modelos matemáticos, para a construção de tabelas de volumes para Leucaena leucocephala, visando reduzir tempo e custos sem perda de precisão. Os dados foram provenientes de um experimento conduzido na Estação Experimental da Empresa Pernambucana de Pesquisa Agropecuária (IPA), Caruaru-PE. Foram utilizadas 201 árvores de leucena, que tiveram seus volumes cubados pelo método de Smalian, e 20 variáveis independentes medidas nas mesmas árvores. Para a seleção das variáveis independentes foram utilizados os seguintes métodos: Componentes Principais, Análise de Agrupamento, R2 Máximo e Mínimo, Stepwise, Forward, Backward e Critério de Akaike. No geral, os métodos univariados e multivariados empregados no descarte de variáveis independentes para modelos volumétricos, conduzem a respostas semelhantes, mesmo que possuam estruturas diferentes em relação às variáveis independentes, desde que o número dessas variáveis seja elevado. Além dos testes estatísticos aplicados, o julgamento do pesquisador sobre a relevância das variáveis selecionadas nas equações resultantes, é de grande importância, principalmente, na redução de custos e do erro de amostragem
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Bradshaw, Steve. "Style anomalies on the London Stock Exchange : an analysis of univariate, multivariate and timing strategies." Thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/6691.

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According to Dimson (1998), modem financial theory is founded on the assumption that markets are highly efficient. The presence of anomalous stock market behaviour has therefore attracted a great amount of research internationally. This thesis investigates the presence and exploitability of style anomalies on the London Stock Exchange (LSE) and is divided into three main branches of research.
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Janari, Emile. "The behaviour of style anomalies on the Australian Stock Exchange : a univariate and multivariate analysis." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/15905.

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Recent attempts to empirically verify the Sharpe (1964), Lintner (1965), Moss in (1966), and Black (1972) Capital Asset Pricing Model (CAPM) have identified numerous inconsistencies with the model's predictions. A number of variables have displayed evidence of the ability to explain the cross-sectional variation in share returns beyond that explained by data. These anomalous effect have become known as "style effects " or "style characteristics". This thesis sets out to examine the existence and behaviour of these style-characteristics over the period June 1994 to May 2004. A data set of 207 firm-specific attributes is created for all Australian Stock Exchange (ASX) All Ordinaries stocks listed on 1 September 2004. The data are adjusted for both thin trading and look-ahead bias. The study largely follows the tests of van Rensburg and Robertson (2003) who adopt the characteristic-based approach of Fama and Macbeth (1973). Attributes are tested for the ability to explain the cross-sectional variation in ASX share returns beyond that explained by the CAPM and a principal-components-derived APT model. Similar significant characteristics are found when unadjusted and both risk-adjusted returns sets are examined. The set of significant characteristics d e rived from the unadjusted returns test is then simplified using correlation analysis and an agglomerative hierarchical clustering algorithm, resulting in a list of 27 variables that are not highly correlated with each other. These characteristics are divided into nine interpretation groups or combinations thereof, namely: (1) Liquidity; (2) Momentum; (3) Performance; (4) Size; (5) Value; (6) Change in Liquidity; (7) Change in Performance; (8) Change in Size; and (9) Change in Value. While the existence of the anomalies found in prior Australian literature (size, price-per-share, M/B, cashflow-to-price, and short- to medium-term momentum) is confirmed, the PIE effect is not found to be significant in this study. As these previously documented anomalies only cover five of the final 27 characteristics, this paper identifies 2 2 new Australian anomalies. Six style-timing models are evaluated for the ability to forecast the monthly payoffs to the 27 characteristics. A twelve-lag autoregressive model convincingly displays the best performance against moving average and historic mean models. Parametric and nonparametric tests find inconclusive evidence of seasonality in the monthly payoffs to the attributes. The 27 significant style characteristics are then used to construct a multifactor style-characteristics model which comprises a set of factors that are significant when simultaneously cross-sectionally regressed on share returns. The employed construction method yields a five-factor style model for the ASX and comprises: (1) prior twelve-month momentum; (2) book-to-market value; (3) two-year percentage change in dividends paid; (4) cashflow-to-price; and (5) two-year percentage change in market-to-book value. Finally, a step wise procedure is performed using six style-timing models. Five dynamic multifactor expected return models are created and contrast with a static multifactor expected return model similar to that used in van Rensburg and Robertson (2003). The derived expected return models have between three and thirteen factors. While all six models display good forecasting ability, the dynamic (trailing moving average) models all perform better than the static (historic mean) model. This is convincing evidence that the asset pricing relationship follows a dynamic model.
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Schwartz, Michael. "Optimized Forecasting of Dominant U.S. Stock Market Equities Using Univariate and Multivariate Time Series Analysis Methods." Chapman University Digital Commons, 2017. http://digitalcommons.chapman.edu/comp_science_theses/3.

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This dissertation documents an investigation into forecasting U.S. stock market equities via two very different time series analysis techniques: 1) autoregressive integrated moving average (ARIMA), and 2) singular spectrum analysis (SSA). Approximately 40% of the S&P 500 stocks are analyzed. Forecasts are generated for one and five days ahead using daily closing prices. Univariate and multivariate structures are applied and results are compared. One objective is to explore the hypothesis that a multivariate model produces superior performance over a univariate configuration. Another objective is to compare the forecasting performance of ARIMA to SSA, as SSA is a relatively recent development and has shown much potential. Stochastic characteristics of stock market data are analyzed and found to be definitely not Gaussian, but instead better fit to a generalized t-distribution. Probability distribution models are validated with goodness-of-fit tests. For analysis, stock data is segmented into non-overlapping time “windows” to support unconditional statistical evaluation. Univariate and multivariate ARIMA and SSA time series models are evaluated for independence. ARIMA models are found to be independent, but SSA models are not able to reach independence. Statistics for out-of-sample forecasts are computed for every stock in every window, and multivariate-univariate confidence interval shrinkages are examined. Results are compared for univariate, bivariate, and trivariate combinations of highly-correlated stocks. Effects are found to be mixed. Bivariate modeling and forecasting with three different covariates are investigated. Examination of results with covariates of trading volume, principal component analysis (PCA), and volatility reveal that PCA exhibits the best overall forecasting accuracy in the entire field of investigated elements, including univariate models. Bivariate-PCA structures are applied in a back-testing environment to evaluate economic significance and robustness of the methods. Initial results of back-testing yielded similar results to those from earlier independent testing. Inconsistent performance across test intervals inspired the development of a second technique that yields improved results and positive economic significance. Robustness is validated through back-testing across multiple market trends.
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Books on the topic "Univariate and multivariate analysis"

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Wei, William W. S. Time series analysis: Univariate and multivariate methods. Redwood City, CA: Addison-Wesley, 1993.

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Time series analysis: Univariate and multivariate methods. Redwood City, Calif: Addison-Wesley Pub., 1990.

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Time series analysis: Univariate and multivariate methods. 2nd ed. Boston: Pearson Addison Wesley, 2006.

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Statistical analysis: An interdisciplinary introduction to univariate & multivariate methods. New York: Radius Press, 1986.

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Denis, Daniel J. SPSS Data Analysis for Univariate, Bivariate, and Multivariate Statistics. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119465775.

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Handbook of univariate and multivariate data analysis with IBM SPSS. Boca Raton: Taylor & Francis, 2014.

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Srivastava, M. S. Admissibility of the inverse and the inadmissibility of the classical estimators in multi-univariate calibration. [Toronto]: University of Toronto, Dept. of Statistics, 1994.

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J, Kim John, ed. Effect sizes for research: Univariate and multivariate applications. 2nd ed. New York: Psychology Press, 2012.

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Handbook of univariate and multivariate data analysis and interpretation with SPSS. Boca Raton: Chapman & Hall/CRC, 2006.

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Timmons, Paul James. An analysis of the Venezuelan real exchange rate using multivariate and univariate cointegration. [s.l.]: typescript, 1997.

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Book chapters on the topic "Univariate and multivariate analysis"

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Huberty, Carl J., and John D. Morris. "Multivariate analysis versus multiple univariate analyses." In Methodological issues & strategies in clinical research., 351–65. Washington: American Psychological Association, 1992. http://dx.doi.org/10.1037/10109-030.

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Cleff, Thomas. "Univariate Data Analysis." In Applied Statistics and Multivariate Data Analysis for Business and Economics, 27–70. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17767-6_3.

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Labuschagne, Coenraad C. A., Niel Oberholzer, and Pierre J. Venter. "Univariate and Multivariate GARCH Models Applied to the CARBS Indices." In Advances in Panel Data Analysis in Applied Economic Research, 69–83. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70055-7_6.

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Beeram, Satyanarayana Reddy, and Swarna Kuchibhotla. "Time Series Analysis on Univariate and Multivariate Variables: A Comprehensive Survey." In Communication Software and Networks, 119–26. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5397-4_13.

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Stanley, Clifford R., and Alastair J. Sinclair. "Univariate Patterns in the Design of Multivariate Analysis Techniques for Geochemical Data Evaluation." In Quantitative Analysis of Mineral and Energy Resources, 113–30. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-4029-1_7.

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Fahrmeir, Ludwig, and Gerhard Tutz. "Modelling and Analysis of Cross-Sectional Data: A Review of Univariate Generalized Linear Models." In Multivariate Statistical Modelling Based on Generalized Linear Models, 15–67. New York, NY: Springer New York, 2001. http://dx.doi.org/10.1007/978-1-4757-3454-6_2.

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Fahrmeir, Ludwig, and Gerhard Tutz. "Modelling and analysis of cross—sectional data: a review of univariate generalized linear models." In Multivariate Statistical Modelling Based on Generalized Linear Models, 15–62. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4899-0010-4_2.

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Chakraborty, Ashis Kumar, and Moutushi Chatterjee. "Univariate and Multivariate Process Capability Analysis for Different Types of Specification Limits." In Springer Series in Reliability Engineering, 47–81. London: Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-6778-5_3.

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Goswami, Kuheli, Ayandeep Ganguly, Nayan Manna, and Arindam Kumar Sil. "Evaluating Classical and ANN-Based Load Forecasting Techniques Using Univariate and Multivariate Analysis." In Lecture Notes in Electrical Engineering, 349–66. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0749-3_26.

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Delgado-Aranda, Raquel, Guadalupe Dorantes-Méndez, and Martín Oswaldo Méndez. "Analysis of Cardiorespiratory Variations During Sleep in Shift Workers by Univariate and Multivariate Detrended Fluctuation Analysis." In IFMBE Proceedings, 164–71. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30648-9_23.

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Conference papers on the topic "Univariate and multivariate analysis"

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Akal, Cevdet, and Alexey Lukashov. "Newton-Padé approximations for univariate and multivariate functions." In FIRST INTERNATIONAL CONFERENCE ON ANALYSIS AND APPLIED MATHEMATICS: ICAAM 2012. AIP, 2012. http://dx.doi.org/10.1063/1.4747635.

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Elsayed, Nelly, Anthony S. Maida, and Magdy Bayoumi. "An Analysis of Univariate and Multivariate Electrocardiography Signal Classification." In 2019 18th IEEE International Conference On Machine Learning And Applications (ICMLA). IEEE, 2019. http://dx.doi.org/10.1109/icmla.2019.00074.

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Seif, Joseph B. "Microcomputer based interactive analysis of univariate and multivariate ARIMA models." In the 17th conference. New York, New York, USA: ACM Press, 1985. http://dx.doi.org/10.1145/21850.253106.

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Galvan-Tejada, Carlos E., Juan P. Garcia-Vazquez, Jorge I. Galvan-Tejada, and Ramon Brena. "Multivariate or univariate model analysis for indoor location systems: A comparison." In 2015 International Conference on Electronics, Communications and Computers (CONIELECOMP). IEEE, 2015. http://dx.doi.org/10.1109/conielecomp.2015.7086936.

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Sethi, Jasleen Kaur, and Mamta Mittal. "Analysis of Air Quality using Univariate and Multivariate Time Series Models." In 2020 10th International Conference on Cloud Computing, Data Science & Engineering (Confluence). IEEE, 2020. http://dx.doi.org/10.1109/confluence47617.2020.9058303.

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Hu, Zhen, and Sankaran Mahadevan. "Time-Dependent Reliability Analysis Using a New Multivariate Stochastic Load Model." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59185.

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A common strategy for the modeling of stochastic loads in time-dependent reliability analysis is to describe the loads as independent Gaussian stochastic processes. This assumption does not hold for many engineering applications. This paper proposes a Vine-autoregressive-moving average (Vine-ARMA) load model for time-dependent reliability analysis, in problems with a vector of correlated non-Gaussian stochastic loads. The marginal stochastic processes are modeled as univariate ARMA models. The correlations between different univariate ARMA models are captured using the Vine-copula. The ARMA model maintains the correlation over time. The Vine-copula represents not only the correlation between different ARMA models, but also the tail dependence of different ARMA models. The developed Vine-ARMA model therefore can flexibly model a vector of high-dimensional correlated non-Gaussian stochastic processes with the consideration of tail dependence. Due to the complicated structure of the Vine-ARMA model, new challenges are introduced in time-dependent reliability analysis. In order to overcome these challenges, the Vine-ARMA model is integrated with a recently developed single-loop Kriging (SILK) surrogate modeling method. A hydrokinetic turbine blade subjected to a vector of correlated river flow loads is used to demonstrate the effectiveness of the proposed method.
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Esmaeeli, Roja, Haniph Aliniagerdroudbari, Seyed Reza Hashemi, Hammad Al-Shammari, Muapper Alhadri, and Siamak Farhad. "Univariate and Multivariate Gauge Repeatability and Reproducibility Analysis on the High Frequency Dynamic Mechanical Analysis (DMA) Measurement System." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10986.

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Abstract The quality of the collected data from a measurement system affects eventual decision making process. Therefore, the reliability of any measurement system is an important factor to be studied. Gauge repeatability and reproducibility (Gauge R&R) is the standard method to evaluate the measurement system and assess the adequacy of variation in the measurement data. Gauge R&R is a statistical tool which evaluates two main characteristics of the measurement system: repeatability and reproducibility. The Dynamic Mechanical Analysis (DMA) is a common measurement system for studying the dynamic mechanical properties of viscoelastic materials such as polymers. The newly developed High Frequency Dynamic Mechanical Analysis (HFDMA) is able to directly run the simple shear test at high frequencies without changing the specimen temperature. The complex shear modulus and damping factor of the viscoelastic materials are reported by the HFDMA system. In this study the uni-variable Gauge R&R study based on Analysis of Variance (ANOVA) is done on each measured characteristic of the HFDMA measurement system. The source of variations for each characteristic is distinguished. Then the multivariate Gauge R&R based on the Multivariate Analysis of Variance (MANOVA) is done and the percentage of multivariate Gauge R&R for the measurement with the multiple variables is reported. The results indicate that the HFDMA measurements are both repeatable and reproducible. Thus, the new HFDMA can be used as a measurement system to measure the mechanical properties of viscoelastic materials at high frequencies.
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Norgaard, Martin, Douglas N. Greve, Claus Svarer, Stephen C. Strother, Gitte M. Knudsen, and Melanie Ganz. "The Impact of Preprocessing Pipeline Choice in Univariate and Multivariate Analyses of PET Data." In 2018 International Workshop on Pattern Recognition in Neuroimaging (PRNI). IEEE, 2018. http://dx.doi.org/10.1109/prni.2018.8423962.

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Rahman, S., H. Xu, and B. N. Rao. "Probabilistic Fracture of Isotropic Functionally Graded Materials." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71518.

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This paper presents a new probabilistic method for reliability analysis of cracks in linear-elastic, isotropic, functionally graded media subject to random loads, material and gradation properties, and crack geometry. The method involves an interaction integral for calculating crack-driving forces and a novel function decomposition that facilitates lower-variate approximations of a general multivariate function. The fracture reliability analysis is based on response-surface models of univariate and bivariate approximations and subsequent Monte Carlo simulation. Two numerical examples illustrating both deterministic and stochastic aspects of fracture are presented. The numerical results indicate that the univariate and bivariate response-surface methods provide both accurate and efficient estimates of failure probability of cracks in functionally graded materials.
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Li, Meng, Mohammad Kazem Sadoughi, Zhen Hu, and Chao Hu. "System Reliability Analysis Using Hybrid Gaussian Process Model." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-98173.

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Abstract This paper proposes a system reliability analysis method based on the hybrid of multivariate Gaussian process (MGP) and univariate Gaussian process (UGP) models, named as hybrid Gaussian process-based system reliability analysis (HGP-SRA). MGP and UGP models are selectively constructed for the components of a complex engineered system: MGP models are constructed over the groups of highly interdependent components and the individual UGP models are built over the components which are relatively independent of one another. A nonlinear-dependence measure, namely the randomized dependence coefficient, is adopted to adaptively learn and quantify the pairwise dependencies of the components with both linear and nonlinear dependency patterns. In the proposed HGP-SRA method, initial hybrid Gaussian process (HGP) models are first constructed with a set of near-random samples and these surrogate models are then updated with new samples that are sequentially identified based on the acquisition function named as multivariate probability of improvement (MPI). The results of two mathematical and a real-world engineering case studies suggest that the proposed method can achieve better accuracy and efficiency in system reliability estimation than the benchmark surrogate-based methods.
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Reports on the topic "Univariate and multivariate analysis"

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Corriveau, Elizabeth, Ashley Mossell, Holly VerMeulen, Samuel Beal, and Jay Clausen. The effectiveness of laser-induced breakdown spectroscopy (LIBS) as a quantitative tool for environmental characterization. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40263.

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Laser-induced breakdown spectroscopy (LIBS) is a rapid, low-cost analytical method with potential applications for quantitative analysis of soils for heavy metal contaminants found in military ranges. The Department of Defense (DoD), Army, and Department of Homeland Security (DHS) have mission requirements to acquire the ability to detect and identify chemicals of concern in the field. The quantitative potential of a commercial off-the-shelf (COTS) hand-held LIBS device and a classic laboratory bench-top LIBS system was examined by measuring heavy metals (antimony, tungsten, iron, lead, and zinc) in soils from six military ranges. To ensure the accuracy of the quantified results, we also examined the soil samples using other hand-held and bench-top analytical methods, to include Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and X-Ray Fluorescence (XRF). The effects of soil heterogeneity on quantitative analysis were reviewed with hand-held and bench-top systems and compared multivariate and univariate calibration algorithms for heavy metal quantification. In addition, the influence of cold temperatures on signal intensity and resulting concentration were examined to further assess the viability of this technology in cold environments. Overall, the results indicate that additional work should be performed to enhance the ability of LIBS as a reliable quantitative analytical tool.
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Bhaduri, Gargi. Probability or Non-probability Samples: Testing Univariate Estimates vs Multivariate Relations. Ames: Iowa State University, Digital Repository, November 2015. http://dx.doi.org/10.31274/itaa_proceedings-180814-11.

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Booth-Kewley, S. An Empirical Comparison of the Accuracy of Univariate and Multivariate Corrections for Range Restriction. Fort Belvoir, VA: Defense Technical Information Center, February 1985. http://dx.doi.org/10.21236/ada153071.

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Madych, W. R. Multivariate Multiscale Analysis. Fort Belvoir, VA: Defense Technical Information Center, November 1990. http://dx.doi.org/10.21236/ada229502.

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Rao, C. R. Applications of Multivariate Analysis. Fort Belvoir, VA: Defense Technical Information Center, January 1993. http://dx.doi.org/10.21236/ada265250.

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Dzhangarov, A. I. Multivariate analysis of variance analysis software. Engineering Herald of Don, 2019. http://dx.doi.org/10.18411/0236-8898-1123.

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Dzhangarov, A. I. Multivariate analysis of variance analysis software. Engineering Herald of Don, 2019. http://dx.doi.org/10.18411/0236-8898-1123-2020.

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Krishnaiah, P. R., and C. R. Rao. Multivariate Analysis and Its Application. Fort Belvoir, VA: Defense Technical Information Center, September 1987. http://dx.doi.org/10.21236/ada189983.

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Rao, C. R. Multivariate Analysis and Its Applications. Fort Belvoir, VA: Defense Technical Information Center, February 1989. http://dx.doi.org/10.21236/ada205585.

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Anderson, Theodore W. Time Series Analysis and Multivariate Statistical Analysis. Fort Belvoir, VA: Defense Technical Information Center, November 1988. http://dx.doi.org/10.21236/ada202273.

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