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Introduction Data Kruskal-Wallis test Aim and hypotheses Assumptions In R Interpretations Post-hoc tests Dunn test Pairwise Wilcoxon test Combination of statistical results and plot Summary References Introduction In a previous article, we showed how to do an ANOVA in R to compare three or more groups. Remember that, as for many statistical tests, the one-way ANOVA requires that some assumptions are satisfied in order to be able to use and interpret the results....