#+TITLE: Rapport package team
#+AUTHOR: Wilcoxon test
#+DATE: 2011-04-26 20:25 CET
** Description
In this template Rapporter will present you Wilcoxon test.
*** Introduction
[[http://en.wikipedia.org/wiki/Wilcoxon_test][Wilcoxon test]] (or its
equivalent the Mann-Whitney U test) is a non-parametric statistical test
which can be an alternative of the paired Student's t-test, t-test for
matched pairs, or the t-test for dependent samples. When the Wilcoxon
test is used to compare two samples of values which are not paired, it
makes no assumption about the shape of the distribution, only that (as
null hypothesis) the distribution from which mpg was sampled is the same
as the distribution from which cyl was sampled. The null hypothesis
states that the variances of the variables are equal.
| Test statistic | P value | Alternative hypothesis |
|------------------+---------------------+--------------------------|
| 1024 | /4.306e-12/ * * * | two.sided |
#+CAPTION: Wilcoxon rank sum test with continuity correction mpg and cyl
As you can see in the table the the p-value of the Wilcoxon test is
/4.306e-12/, thus we can accept the assumption of the null hypothesis,
so we can say that statistically the variances are equal.
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This report was generated with [[http://www.r-project.org/][R]] (3.0.1)
and [[http://rapport-package.info/][rapport]] (0.51) in /0.138/ sec on
x86\_64-unknown-linux-gnu platform.
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