Power study of anova versus Kruskal-Wallis test
by Tanja Van Hecke.
This paper describes the comparison of the anova and the Kruskal-Wallis test by means of
the power when violating the assumption about normally distributed populations. The permutation method
is used as a simulation method to determine the power of the test. It appears that in the case of
asymmetric populations the non-parametric Kruskal-Wallis test performs better than the parametric
equivalent anova method.
anova, kruskal-wallis, permutation test, power
Tanja Van Hecke, Tanja.VanHecke@hogent.be
Zheng Su, email@example.com
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