Statistics Toolbox

Wilcoxon Rank Sum Test

Introduction

This module performs a test for a difference between two population locations (means or medians). This is a nonparametric test, therefore knowledge of the precise form of the population distributions is not necessary. Select only a single 'sample 1' subset and a single 'sample 2' subset. The data can be further subsetted using the panel and group variables. Further discussion of the test setting and assumptions is contained in the method section of the module.

Data Upload Required

This tool requires a dataset for analysis. Please upload a dataset using the interface below, or upload one of the example datasets using the Input Data menu at left.

File Upload

Upload a dataset

  • StatDataML - XML based data exchange format [*.sdml]
  • ESRI shape file - ESRI shape files can be uploaded [*.shp]
  • Text tab delimited - Data should be in uninterrupted rows and columns with fields separated by a tab and field or column names in the first row. [*.everything else]
  • Note: File size is limited to approximately 1 MB. Attempts to load larger files may result in an error.
Enter the path and file name below or browse your computer for a file.