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Dissertations / Theses on the topic 'Wilcoxon test'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Kubáňová, Andrea. "Fúze obchodních korporací a jejich vliv na finanční situaci." Master's thesis, Vysoká škola ekonomická v Praze, 2016. http://www.nusl.cz/ntk/nusl-262379.

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This thesis is concerned with domestic mergers of business corporations realized between 2009 - 2012 and their influence on financial situation of chosen subjects. The first part of my paper describes basic theoretical aspects of mergers including their division and motives leading to the realization and their phases. The second chapter consists of trade-legal and accounting adjustment of mergers. Considering practical part, the main focus is on legal modification valid from 31. 12. 2011 to 1. 1. 2012. Following part of this thesis explains accounting solutions of mergers in example, where the

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2

Lousa-Alvin, Alexandra. "Kungsängsverkets kväverening : inverkan på den interna fosforbelastningen i Ekoln." Thesis, Uppsala universitet, Institutionen för ekologi och genetik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-162249.

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Många sjöar är idag påverkade av mänsklig aktivitet, bland annat är 1 % av Sveriges sjöar eutrofierade, däribland Ekoln. Ekoln är en stor sjö i Uppsala län söder om Uppsala som länge varit eutrofierad. Fyrisån och Örsundaån är de största inflödena till Ekoln och Sävjaån är ett betydande biflöde till Fyrisån. Kungsängsverket är Uppsalas reningsverk och har sitt utlopp i Fyrisån och som ett led i att minska eutrofieringen byggdes fosforreningen ut 1972. Fosforhalterna i Ekoln sjönk och algblomningarna blev färre. Kvävereningen byggdes ut 1999 och i detta arbete utvärderas detta reningssteg. Hy

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Inga, de La Cruz Elvis Edgard. "A abordagem não paramétrica para avaliação da percepção de sustentabilidade do sistema de produção de arroz de terras altas." Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/5713.

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Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2016-07-13T15:19:52Z No. of bitstreams: 2 Dissertação - Elvis Edgard Inga de La Cruz - 2015.pdf: 4690319 bytes, checksum: fb5f7a5ba3966e716246274700bab6ae (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-07-14T11:29:19Z (GMT) No. of bitstreams: 2 Dissertação - Elvis Edgard Inga de La Cruz - 2015.pdf: 4690319 bytes, checksum: fb5f7a5ba3966e716246274700bab6ae (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (M

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Öhman, Marie-Louise. "Aspects of analysis of small-sample right censored data using generalized Wilcoxon rank tests." Doctoral thesis, Umeå universitet, Statistiska institutionen, 1994. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-7313.

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The estimated bias and variance of commonly applied and jackknife variance estimators and observed significance level and power of standardised generalized Wilcoxon linear rank sum test statistics and tests, respectively, of Gehan and Prentice are compared in a Monte Carlo simulation study. The variance estimators are the permutational-, the conditional permutational- and the jackknife variance estimators of the test statistic of Gehan, and the asymptotic- and the jackknife variance estimators of the test statistic of Prentice. In unbalanced small sample size problems with right censoring, the

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Moradi, Behrouz. "Utvärdering av tre olika metoder för Van Gieson Elastin färgning på Kolorektalcancer i syfte att identifiera venös invasion." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-92919.

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Kolorektalcancer är den tredje vanligaste cancerformen hos både män och kvinnor i Sverige där storkärls invasion, venös invasion (VI), är en viktig prognostisk indikator. Noggrann bedömning av VI är särskilt viktigt för patienter med kolorektal cancer i stadium II eftersom det kan påverka beslutet att erbjuda adjuvant behandling. Histologisk bedömning av VI kan vara utmanande på rutinmässig Hematoxylin och Eosin färgning (H&E). Elastinfärgning med syfte att identifiera elastinfibrer i kärlväggen kan underlätta bedömning av VI. I dagsläget finns inte någon bra elastinfärgning som kan använd

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6

Zhang, Yan. "The impact of midbrain cauterize size on auditory and visual responses' distribution." unrestricted, 2009. http://etd.gsu.edu/theses/available/etd-04202009-145923/.

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Thesis (M.S.)--Georgia State University, 2009.<br>Title from file title page. Yu-Sheng Hsu, committee chair; Xu Zhang, Sarah. L. Pallas, committee members. Description based on contents viewed June 12, 2009. Includes bibliographical references (p. 37). Appendix A: SAS code: p. 38-53.

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NASCIMENTO, Rosângela Silveira do. "Análise de correlação de longo alcance no registro da atividade elétrica cortical no fenômeno da depressão alastrante em ratos." Universidade Federal Rural de Pernambuco, 2008. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5308.

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Submitted by (ana.araujo@ufrpe.br) on 2016-08-12T14:04:00Z No. of bitstreams: 1 Rosangela Silveira do Nascimento.pdf: 1012353 bytes, checksum: b5f0d139481ab0bfdd6a1f689175c1f6 (MD5)<br>Made available in DSpace on 2016-08-12T14:04:00Z (GMT). No. of bitstreams: 1 Rosangela Silveira do Nascimento.pdf: 1012353 bytes, checksum: b5f0d139481ab0bfdd6a1f689175c1f6 (MD5) Previous issue date: 2008-02-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In the present work we analyze the dynamics of electrical cortical activity during the phenomenon of spreading depression

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FOSTER, WARREN R. "THE IMPACT OF A BIDDER WORKSHOP ON SELF-EFFICACY." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1171310672.

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9

Fagerlund, Elias, and Talukder Mashrukh. "Where to Invest? : Choosing the optimal stock market for investing in a cross-listed Nordic firm." Thesis, Umeå universitet, Företagsekonomi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-60556.

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The purpose of this study is to investigate whether the location of buying stocks in a Nordic cross-listed company matters in terms of 1) earning abnormal returns, or 2) gaining in optimizing the amount spent by buying the specific stock cheap. Nowadays, markets are becoming more integrated and if we believe in the efficient market hypothesis, prices of the same class of stocks paying the same dividend annually, of an MNC must be the same irrespective of the stock exchange it is listed upon. Though efficient market hypothesis exists in theory, market imperfection is a reality. All the Nordic (

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Matsouaka, Roland Albert. "Contributions to Imputation Methods Based on Ranks and to Treatment Selection Methods in Personalized Medicine." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10078.

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The chapters of this thesis focus two different issues that arise in clinical trials and propose novel methods to address them. The first issue arises in the analysis of data with non-ignorable missing observations. The second issue concerns the development of methods that provide physicians better tools to understand and treat diseases efficiently by using each patient's characteristics and personal biomedical profile. Inherent to most clinical trials is the issue of missing data, specially those that arise when patients drop out the study without further measurements. Proper handling of miss

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11

Burson, Patrick A. R. "An analysis of the impact of data errors on backorder rates in the F404 engine system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FBurson.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, March 2003.<br>Thesis advisor(s): Robert A. Koyak, Samuel E. Buttrey. Includes bibliographical references (p. 63-64). Also available online.

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12

Tang, Tian. "Infrared Spectroscopy in Combination with Advanced Statistical Methods for Distinguishing Viral Infected Biological Cells." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/math_theses/59.

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Fourier Transform Infrared (FTIR) microscopy is a sensitive method for detecting difference in the morphology of biological cells. In this study FTIR spectra were obtained for uninfected cells, and cells infected with two different viruses. The spectra obtained are difficult to discriminate visually. Here we apply advanced statistical methods to the analysis of the spectra, to test if such spectra are useful for diagnosing viral infections in cells. Logistic Regression (LR) and Partial Least Squares Regression (PLSR) were used to build models which allow us to diagnose if spectral differences

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Luo, Shan. "Advanced Statistical Methodologies in Determining the Observation Time to Discriminate Viruses Using FTIR." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/math_theses/86.

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Fourier transform infrared (FTIR) spectroscopy, one method of electromagnetic radiation for detecting specific cellular molecular structure, can be used to discriminate different types of cells. The objective is to find the minimum time (choice among 2 hour, 4 hour and 6 hour) to record FTIR readings such that different viruses can be discriminated. A new method is adopted for the datasets. Briefly, inner differences are created as the control group, and Wilcoxon Signed Rank Test is used as the first selecting variable procedure in order to prepare the next stage of discrimination. In the seco

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Öhman, Marie-Louise. "Aspects of analysis of small sample right censored data using generalized Wilcoxon rank tests /." Umeå : Univ, 1994. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=006873072&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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15

Liu, Yunfeng. "Tests of Bivariate Stochastic Order." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20257.

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The purpose of this thesis is to compare rank-based tests of bivariate stochastic order. Given two bivariate distributions $F$ and $G$, the general problem we are dealing with is to test $H_0: F=G$ against $H_1:F<G$, where $F$ and $G$ are independent continuous distributions on $\Re ^2$. (``$F<G$" means that $F(x)\leq G(x)~\forall x\in \Re^2$, and $\exists x\in \Re^2$ such that $F(x)< G(x)$.). In particular, we will analyze three analogues of the one-dimensional Mann-Whitney-Wilcoxon test in two dimensions. Two of the test statistics are new; we call them the Kendall and Spearman statistics. W

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16

Nyström, Josefina. "Multivariate non-invasive measurements of skin disorders." Doctoral thesis, Umeå University, Chemistry, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-865.

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<p>The present thesis proposes new methods for obtaining objective and accurate diagnoses in modern healthcare. Non-invasive techniques have been used to examine or diagnose three different medical conditions, namely neuropathy among diabetics, radiotherapy induced erythema (skin redness) among breast cancer patients and diagnoses of cutaneous malignant melanoma. The techniques used were Near-InfraRed spectroscopy (NIR), Multi Frequency Bio Impedance Analysis of whole body (MFBIA-body), Laser Doppler Imaging (LDI) and Digital Colour Photography (DCP).</p><p>The neuropathy for diabetics was stu

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17

Janstad, Tobias. "Case study of a contract system : considering pulp prices from 1996-2006." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1684.

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<p>Södra Cell sells 1 900 000 ton pulp every year. Of this 490 000 tonne is sold with a contract system based on a pricing index called PIX NBSK. This index was started in 1996 and reflects the price of pulp from conferious forest. We study the NBSK PIX value of softwood from October 1996 to December 2006.</p><p>People working in this branch known that there is strong periodicity in the prices. We use predictive analysis to see if clients can benefit from the periodicity and use the options in the contract system Södra offers today. We conclude that a drawback for the current contract system i

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18

Khan, Abdul Kareem. "Electrostaticanalisys the Ras active site." Doctoral thesis, Universitat Pompeu Fabra, 2009. http://hdl.handle.net/10803/7161.

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La preorganització electrostàtica del centre actiu s'ha postulat com el mecanisme genèric de l'acció dels enzims. Així, alguns residus "estratègics" es disposarien per catalitzar reaccions interaccionant en una forma més forta amb l'estat de transició, baixant d'aquesta manera el valor de l'energia dactivació g cat. S'ha proposat que aquesta preorientació electrostática s'hauria de poder mostrar analitzant l'estabilitat electrostàtica de residus individuals en el centre actiu.<br/>Ras es una proteïna essencial de senyalització i actúa com un interruptor cel.lular. Les característiques

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19

Hansson, Mats. "Analys av argument som uttrycks i samband med ett levande rollspel om embryonala stamceller : En designbaserad studie med analysverktyget TKE av hur argumentens kvalitet utvecklas under en undervisningssekvens." Thesis, Stockholms universitet, Institutionen för matematikämnets och naturvetenskapsämnenas didaktik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-114131.

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Diskussioner om användandet av embryonala stamceller är exempel på ett område där naturvetenskapliga teorier möter en diskussion i samhällshällsdebatten. Värderingar med t ex etiska utgångspunkter påverkar hur naturvetenskaplig forskning bedrivs och hur resultaten från denna forskning tillämpas. När sådana frågor, samhällsfrågor med naturvetenskapligt innehåll, SNI (socioscientific issues, SSI), tas upp i undervisningen är det angeläget att belysa att det i samhällsdebatten förekommer en diskussion där företrädare för ståndpunkter för fram olika argument i frågan. Ett sätt att möta detta behov

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20

McGarry, Gregory John. "Model-based mammographic image analysis." Thesis, Queensland University of Technology, 2002.

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Roothaer, Xavier. "Approche multi-échelle du comportement mécanique des os porteurs et non-porteurs : vers une personnalisation des modèles numériques EF de l'être humain." Thesis, Valenciennes, Université Polytechnique Hauts-de-France, 2019. http://www.theses.fr/2019UPHF0020.

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Le squelette humain a pour fonction de protéger les organes internes tout en participant au système de locomotion. Aﬁn d’en assurer la rigidité mécanique, l’os cortical est présent dans toutes les parties du squelette. Le remodelage osseux, processus dynamique, est actif tout au long de la vie. Il permet à l’os cortical d’adapter sa géométrie et son architecture interne en fonction des contraintes qui lui sont appliquées. Étant un processus complexe, le remodelage osseux est amené à dysfonctionner chez les personnes âgées et fragiliser leurs os. Ainsi, cette thèse étudie les os porteurs et non

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22

Huang, Yi-hsuan, and 黃怡萱. "Wilcoxon Rank Sum Test for Interval Censored Data." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/57947053170538616505.

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碩士<br>國立高雄大學<br>統計學研究所<br>102<br>Wilcoxon rank sum test is a useful nonparametric method for testing the equality of distribution of two populations. It has greater efficiency than the t-test on heavy tail distribution, and is nearly as efficient as the t-test on normal distribution. In this paper, an extension of Wilcoxon test for interval censored data which are often found in longitudinal studies is provided. A series of simulation is given to show the performance of the proposed method and the power of our proposed test is better than Finkelstein (1986) and Sun (1996) in some circumstance.

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Shen, Ching-Fu, and 沈清福. "A Weighted Wilcoxon-Type Rank Test for Interval-Censored Data." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/77062299331027697269.

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博士<br>國立中山大學<br>應用數學系研究所<br>101<br>Interval-censored (IC) failure time data are often observed in medical follow-up studies and clinical trials where subjects can only be followed periodically and the failure time can only be known to lie in an interval. In this paper, we propose a weighted Wilcoxon-type rank test for the problem of comparing two IC samples. Under a very general sampling technique developed by Fay (1999), the mean and variance of the test statistic under the null hypothesis can be derived. Through simulation studies, we ‾nd that the performance of the proposed test is better t

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Alharbi, Abdulwahab. "The Use of Net Benefit in Modeling Non-Proportional Hazards." Thesis, 2020. http://hdl.handle.net/1805/24746.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Background: The hazard ratio (HR), representing the quantified estimate of treatment effect in survival analysis, measures the instantaneous relative difference of failure risk between two groups. The HR is typically assumed to be independent of time; however, this assumption is usually violated in practice. If the proportionality assumption holds, HR can be validly with the popular Cox proportional hazards model. When not proportional, the Wilcoxon-Gehan has been proposed to test the hypothesis of no difference. These have been rece

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25

Quintero-Rincón, Antonio. "Familiaridad en melodías, un estudio introductorio a la memoria musical basándose en la medición del potencial evocado N400." Tesis, 2015. http://hdl.handle.net/10915/46281.

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La cognición y la percepción musical es el estudio científico de las operaciones mentales y neuronales que subyacen al escuchar, crear, moverse y componer música; su interdisciplinariedad incluye métodos de la psicología cognitiva y sensorial, la neurociencia, la musicología, la informática, la teoría musical, las matemáticas, el procesamiento de señales, la genética, la biología y los aspectos socioculturales de la música. El Procesamiento de la música es una actividad mental compleja con un alto componente cognitivo que involucra varias áreas del cerebro, la música cada vez más se utiliza co

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Bouvrette, Mathieu. "Modèle bayésien pour les prêts investisseurs." Thèse, 2006. http://hdl.handle.net/1866/8193.

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Mothobi, Neo Jack. "Experiences of Physical Sciences teachers when introduced to an electronic expert system." Diss., 2013. http://hdl.handle.net/2263/37313.

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This study outlines the strategies that were employed during the training of Grade 11 Physical Sciences teachers in the use and development of an Electronic Performance Support System (EPSS). The EPSS process involves extended individualised support for teachers through face-to-face training. A purposive sample was utilised and 22 Grade 11 Physical Sciences teachers participated in the study. Teachers’ skills and knowledge before and after the EPSS training process were measured on three measures of satisfaction (course material, the EPSS training process and the trainer’s competencies) and th

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Datta, Arya. "Exploring the effects of ECBs unconventional monetary policy announcements on European stock markets." Master's thesis, 2020. http://hdl.handle.net/10400.14/29823.

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This paper conducts an event-study analysis to investigate the relationship between unconventional monetary policy announcements by the ECB and corresponding stock returns in the EMU, furthermore, it also postulates a second hypothesis to ascertain whether this relationship differs for firms listed amongst exchanges in Northern region of the EU name Germany, France and The Netherlands with their Southern Counterparts in the EMU, namely Italy, Portugal and Spain between 2006 and 2015. 10-year Government bond yields for Italy and Germany are used to calculate the surprise coefficient, whil

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