Wilcoxon-Mann-Whitney Test

The non-parametric Wilcoxon-Mann-Whitney test (a.k.a. Mann–Whitney U test, Wilcoxon rank-sum test) tests if two independent samples, with ordinal attributes, originate from populations with the same distribution.

More information can be found at Wilcoxon-Mann-Whitney test on Wikipedia.

Hypotheses:
H ₀ : the distributions of the populations are the same.
H _A : the distributions of the populations are different.

Input ports

1. Type: Table
   Samples
   Input table with at least one ordinal column and one nominal column (groups).

Output ports

1. Type: Table
   Results
   Output table with Wilcoxon-Mann-Whitney test statistics, p-Value, and descriptive statistics of group ranks.