Excel Realstats MANN_EXACT function. I'm trying to compute some mann-whitney tests on my datas, and I use the really handy "Realstats". As you can see on this link, there are several functions available. As a noob in stats, I used the MANN_EXACT function to gte my p-values, but after reading some articles I wonder if I shouldn't have used the 1. Your idea: Mann-Whitney tests for everything (which have a lower power and might lead to not getting too many significant results) is potentially misleading you in 2 ways. First, as jbowman says on another page: the worst that the Mann-Whitney can ever perform relative to the t-test is about 0.864 in terms of asymptotic relative efficiency The two-sample Mann-Whitney U test is a rank-based test that compares values for two groups. A significant result suggests that the values for the two groups are different. It is equivalent to a two-sample Wilcoxon rank-sum test. Without further assumptions about the distribution of the data, the Mann-Whitney test does not address Wilcoxon and Mann and Whitney described rank sum tests, which have been shown to be the same. Convention has now ascribed the Wilcoxon test to paired data and the Mann-Whitney U test to unpaired data. It is a commonly held belief that a Mann-Whitney U test is in fact a test for differences in medians. However, two groups could have the same The Wilcoxon Mann-Whitney is a 2 group non-parametric comparison test equivalent to the Parametric t-test that can be used to test treatment effects when data are not normally distributed. The Wilcoxon signed ranks test is for related or matched samples (like 'repeated measures' on the same subjects), The Wilcoxon-Mann-Whitney is for independent samples (different subjects). Cite 8 For the larger sample, a Wilcoxon signed rank test gives strong evidence against the null hypothesis, in favor of increasing Likert scores. wilcox.test (dd, alt="greater") Wilcoxon signed rank test with continuity correction data: dd V = 4154.5, p-value = 0.001487 alternative hypothesis: true location is greater than 0. d6wFiXD.

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