kruskalmc, significant differences while median values are the same
Hello, What about the median ranks? This test is based on ranks. Regards, Pascal Le 12/12/15 18:04, Omphalodes Verna a ?crit :
Dear list! I work with multiple Kruskal-Wallis test (kruskalmc, package pgirmess), which evaluates differences in medians among groups (5 groups). A result of a test is significant differences among some groups, while median values are the same for 4 groups (using tapply). Why? p.s.: number of samples in groups vary from 50 to 4900. Thanks to all, OV .
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