17.5.1 One-Sample Wilcoxon Signed Rank Test

NonParaTest-SignRank1

Introduction

The One-Sample Wilcoxon Signed-Rank Test is a non-parametric alternative to a one-sample t-test. The test determines whether the median of the sample is equal to some specified value. Data should be distributed symmetrically about the median

Handling Missing Values

The missing values in the data range will be excluded in the analysis

Performing One-Sample Wilcoxon Signed Rank Test

To perform a one-sample Wilcoxon signed rank test:

1. Select Statistics: Nonparametric Tests: One-Sample Wilcoxon Signed Rank Test. This opens the signrank1 dialog box.
2. Specify the Data Range, the Test Median, and the Alternate Hypothesis.
3. Upon clicking OK, an analysis report sheet is generated showing basic summary statistics, degrees of freedom, W rank, Z statistic, the associated p-value, and the test conclusion.

Note: Origin provides both asymptotic and exact p-value as result when N < 80. If N > 80, only asymptotic p-value is output

Topics covered in this section: The One-Sample Wilcoxon Signed Rank Test Dialog Box Algorithms Tutorial