Need help from all you experts on how to perform Holm-Bonferroni correction after having done some Mann-Whitney U tests on my data on river dolphins. I did some tests on my data to see for difference in habitats of dolphins and it turned out significant so I thought that I then wanted to do some tests to see WHICH habitats (I have 6 habitats) are significant different. I was adviced to do Mann-Whitney U tests with each habitat against all other to check this, but also do a Bonferroni correction. I checked for this on internet and got that it is even better to do a sequential Bonferroni (Holm-Bonferroni) in this case but I'm having a hard time understanding how to do it and thus I plead for your help on this!
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