If non-parametric methods are used, we can first perform a global Kruskal-Wallis test, followed by pairwise Wilcoxon-Mann-Whitney tests. And, if the data are categorical, we can first perform ...

124). In Figure 2, the graph levels out around 400 to 500 in the largest group. Figure 2 Statistical power for comparing two groups using Pearson's chi-squared test at significance level 5 %. In this ...