نتایج جستجو برای: mann whitney and phi cramer

تعداد نتایج: 16831661  

2012
Jie Fan Somnath Datta

We consider the problem of comparing sojourn time distributions of a transient state in a general multistate system in two samples (groups) when the transition times are right censored. Using the reweighting principle, a two-sample Mann– Whitney type of U -statistic is constructed that compares only the uncensored sojourn times from the two distributions. A second Mann–Whitney type of statistic...

Ala, Alireza , Asghari Jafarabadi, Mohammad , Daemi, Amin , Pourasghar, Faramarz , Tabrizi, Jafar Sadegh ,

Background and Purpose: The emergency severity index (ESI) triage system has been recommended by the Ministry of Health to classify patients at emergency departments. This study aimed to assess the validity of ESI system (version 4) in the emergency department of a teaching hospital. Outcome measures were hospitalization, emergency department (ED) length of stay, resource consumption, in-hos...

Journal: :Chemico-biological interactions 2012
Paul R Sheppard Dennis R Helsel Robert J Speakman Gary Ridenour Mark L Witten

Previously reported dendrochemical data showed temporal variability in concentration of tungsten (W) and cobalt (Co) in tree rings of Fallon, Nevada, US. Criticism of this work questioned the use of the Mann-Whitney test for determining change in element concentrations. Here, we demonstrate that Mann-Whitney is appropriate for comparing background element concentrations to possibly elevated con...

Journal: :international journal of iron and steel society of iran 0
b. mansouri department of statistics, faculty of mathematics and computer science, shahid chamran university of ahvaz h. montazer hojat department of economic, faculty of economics and social sciences, shahid chamran university of ahvaz

structural steel sections are mainly used in beams and columns of building frames. iran national steel industrialgroup is among the oldest and largest producers of beams in iran. it has two beam production lines, namely line630 and line 650. in this study, the mechanical properties of manufactured beams in these production lines werecompared. based on the t-test results, the elongation is signi...

Journal: :Biomedical Journal of Scientific & Technical Research 2021

Journal: :BMC Medical Research Methodology 2005
Andrew J Vickers

BACKGROUND It has generally been argued that parametric statistics should not be applied to data with non-normal distributions. Empirical research has demonstrated that Mann-Whitney generally has greater power than the t-test unless data are sampled from the normal. In the case of randomized trials, we are typically interested in how an endpoint, such as blood pressure or pain, changes followin...

Journal: :Communications in Statistics - Theory and Methods 2016

Journal: :Revista Venezolana de Gerencia 2023

El sector artesanal es un importante eje de desarrollo económico, fuente ingreso para las familias artesanos y una manifestación cultural los pueblos. objetivo identificar aspectos que caracterizan la gestión administrativa financiera del colombiano ecuatoriano, evidenciando similitudes diferencias a fin establecer permitan definir ruta común su desarrollo, con ello gerencia directivos puedan m...

Journal: :International Journal of Statistics and Probability 2017

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