In statistics, the Kruskal-Wallis one-way analysis of variance by ranks (named after William Kruskal and Allen Wallis ) is a non-parametric method. Unlike the analogous one-way analysis of variance, the Kruskal-Wallis test does not assume a normal population.
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References
- William H. Kruskal and W. Allen Wallis. Use of ranks in one-criterion variance analysis. Journal of the American Statistical Association 47 (260): 583–621, December 1952.