Friedman analysis of variance by ranks is the nonparametric counterpart of one-way repeated measures analysis of variance.

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Friedman analysis of variance by ranks is a nonparametric test for comparing three or more related samples. One-way repeated measure ANOVA, on the other hand, is a parametric test used to compare three or more dependent groups based on continuous data. Therefore, Friedman ANOVA by ranks is the nonparametric counterpart of one-way ANOVA instead of repeated measures ANOVA.

Friedman Analysis of Variance by Ranks Is the Nonparametric Counterpart