How to Perform Paired Samples Wilcoxon Test

This article describes how to perform Wilcoxon signed-rank test comparing the median between a pair of samples.

For samples of different sizes see How to Perform Two-Sample Wilcoxon Rank Sum Test.

Requirements

A Displayr document with a data set.

Method

1. Go to Anything > Advanced Analysis > Test > Nonparametric > Paired Samples Wilcoxon Test.
2. Specify the two input variables under Inputs > Paired Samples Wilcoxon Test > Variable 1 and Variable 2.

OPTIONAL: Adjust any other options and settings as required.

• mu - Difference between the median of the two samples, as assumed under the null hypothesis.
• Alternative hypothesis - Use a two-sided or one-sided test.
• Type of test - Method by which the p-value is computed.
• Output
  • Summary - Shows a nicely formatted table of the test results (default).
  • R - The original text-based output from the wilcox.test function.

• Variable names - Display Variable Names in the output, instead of Variable Labels.
• More decimal places - Display numeric values with 8 decimal places.

Next

How to Perform Two-Sample Wilcoxon Rank Sum Test

How to Perform Single-Sample Wilcoxon Test