This document summarizes several nonparametric statistical tests that can be applied to ordinal or nominal data and do not require assumptions about the population distribution. It discusses the sign test, Wilcoxon signed-rank test, Kruskal-Wallis test, Spearman rank correlation, and provides examples of applying each test. The examples analyze consumer preferences, delivery times, investment risk ratings, and determine if there are differences or correlations between groups or variables.