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2009 Nov 30
1
multiple comparisons with non homogeneus variances
...asic assumptions for anova and t tests: *unbalanced data* (some groups contain ten samples, others hundreds) and *non homogenity of variances* (tested with a kruscal test just for a qualitative assessment). Is it possible, and how, to make multiple comparisons when these conditions are met? In past anaylises I've simply used the pairwise.t.test function to do multiple t-test, but know I have to consider the above situation... Thanks a lot, giovanni