An algorithm and code for computing exact critical values for the Kruskal-Wallis nonparametric one-way ANOVA

Abstract

In this article, an algorithm and code to compute exact critical values (or percentiles) for Kruskal-Wallis test on k independent treatment populations with equal or unequal sample sizes using Visual Basic (VB.NET) is provided. This program has the ability to calculate critical values for any k, sample sizes (ni), and significance level (α). An exact critical value table for k = 4 is also developed. The table will be useful to practitioners since it is not available in standard nonparametric statistics texts. The program can also be used to compute any other critical values. Copyright © 2004 JMASM, Inc.