Basic statistics

Non-parametric tests

Rank-based tests for data that are not normal, such as scores, counts or ratings.

Data format

Mann-Whitney and Wilcoxon: two columns with names in the first row. Kruskal-Wallis: one line per group. Friedman: one line per treatment with values in block order.

Organic, 12, 15, 11, 18, 14
Inorganic, 19, 22, 17, 25, 21
Control, 9, 11, 8, 12, 10

You get

Mann-Whitney U and Wilcoxon signed-rank with Z, asymptotic and exact p
Kruskal-Wallis H with Dunn's pairwise test (Bonferroni) and letters
Friedman chi-square with mean ranks and Kendall's W

Downloads as Excel, PDF and Word.

Test

Enter data

Variable names in the first row, then one row per observation (as in Excel or SPSS). A first column of labels such as P1, P2 is ignored.

or drag and drop here