The Wilcoxon Signed-Rank Test is the non-parametric version of the paired t-test. It is used to test whether or not there is a significant difference between two population means.

To perform a Wilcoxon Signed-Rank Test, simply fill in the data values for two samples below and then click the “Calculate” button.

**Sample 1**

**Sample 2**

**W test statistic =** 29.5

**Number of non-tied pairs (n) =** 13

Refer to the critical values table below to decide whether or not the test result is statistically significant based on *n* and your chosen alpha level.

If the test statistic *W* is less than the value found in the critical values table below, then the test result is statistically significant.