This document provides an overview of tests of significance, including: 1) Tests of significance are mathematical methods to determine the probability of an observed difference occurring by chance. They are used to compare sample means, proportions, and associations between attributes. 2) Tests are classified as parametric (follow normal distribution) or non-parametric. Common parametric tests include t-tests and ANOVA, while common non-parametric tests include chi-square, Mann-Whitney U, and Wilcoxon. 3) Key steps in performing a test of significance are stating hypotheses, selecting the appropriate test, calculating test criteria, determining significance level, and interpreting results to draw conclusions.