The Wilcoxon signed-rank test is a non-parametric test that looks for differences between two dependent samples. That is, it tests whether the populations from which two related samples are drawn have the same location. It is the non-parametric equivalents of the dependent (or matched-pairs) t-test. This test has been superseded by developments in robust statistical tests. It’s included here for historical reasons.
- PDF Handout on doing the Wilcoxon signed-rank test using IBM SPSS Statistics
- Data Files