The nonparametric tests for multiple related samples are useful alternatives to a repeated measures analysis of variance. They are especially appropriate for small samples and can be used with nominal or ordinal test variables.

The Cochran Q procedure tests the null hypothesis that multiple related proportions are the same. The Cochran test is a multivariate extension of the McNemar test used for two related samples.

The Friedman procedure tests the null hypothesis that multiple ordinal responses come from the same population. As with the Wilcoxon test for two related samples, the data may come from repeated measures of a single sample or from the same measure from multiple matched samples.