[R] Kruskal-Wallis test and kruskalmc

[greatest.possible.newbie]

I didn't do any research about this but I think it's the following:
If you run several t-tests to compare groups and then do a tukey-HSD you
won't get the same results either.
It's the same with the kruskal-wallis test. This happens because the
variance that is used for computing significant differences changes when you
compare all groups at once instead of only two groups. 



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