Kruskal Wallis H. It is also a popular nonparametric test to compare outcomes among three or more independent unmatched groups. H is the test statistic for the kruskal wallis test.
Non parametric means that the test doesn t assume your data comes from a particular distribution. The kruskal wallis test is a nonparametric test that compares three or more unmatched groups. Allen wallis or one way anova on ranks is a non parametric method for testing whether samples originate from the same distribution.
This test is the nonparametric equivalent of the one way anova and is typically used when the normality assumption is violated.
The h test is used when the assumptions for anova aren t met like the assumption of normality. The approximation is reasonably accurate when no group has fewer than five observations. A kruskal wallis test is used to determine whether or not there is a statistically significant difference between the medians of three or more independent groups. A kruskal wallis test is used to determine whether or not there is a statistically significant difference between the medians of three or more independent groups.
