Differences between Dwass-Steel-Critchlow-Fligner and Mann-Whitney U-test for a post-hoc pairwise analysis
If you have one control and four groups of patients with a non-normal small sample size, there are differences in these tests for a post-hoc analysis after Kruskal-Wallis?
I want to know if changing a button color has a positive effect on different measures (see the 4 measures below), using the following process: There's a default button, which is the fixed control ...
1) Is it okay to run a Mann-Whitney U test on unequal sample sizes i.e. two groups (N=11, N=12)or is there an alternative test? 2) What does it mean when one obtains a zero value for a Mann-Whitney U ...