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Bonferroni correction
In statistics, a procedure whereby the significance level of a statistical test is adjusted in order to protect against Type I errors when multiple comparisons are being made. Thus if 10 t tests need ...
Henry Berthold Mann
(1905–2000; b. Vienna, Austria; d. Tucson, AZ)Austrian mathematician who spent most of his career in the United States. Mann obtained his PhD in number theory at Vienna U in 1935. He emigrated to New ...
Jonckheere–Terpstra test
A k-sample test for trend that is the analogue of the Mann–Whitney test. The test was suggested independently by Jonckheere (in 1954) and Terpstra (in 1952). The assumption is that all k populations ...
Kruskal–Wallis test
A non-parametric test for comparisons between more than two medians, using the relative rankings within the different samples.
median test
In statistics, a distribution-free test of the null hypothesis that two or more independent samples come from populations with the same median. See also Mann-Whitney U test.
non-parametric test
A test that makes no distributional assumptions about the population under investigation. The adjective ‘non-parametric’ was introduced by Wolfowitz in 1942. Non-parametric tests are usually very ...
test for equality of location
Independent random samples are taken from populations with cumulative distribution functions F1 and F2. It is assumed that, for some constant δ, F1(x)=F2 (x+δ) for all x. The null hypothesis is that ...
Wilcoxon rank-sum test
An alternative name for the Mann-Whitney U test, not to be confused with the Wilcoxon matched-pairs test.
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