In this chapter, the authors look at three basic statistical tests. The first is the t-test, which is used when you have nominal or ordinal data and only two test variables you are comparing (e.g., the speed of cats and dogs). The second is the analysis of variance (ANOVA) test for when you have nominal or ordinal data and more than two test variables (e.g., the speed of cats and dogs and pigs). The third statistical analysis is correlation and regression analysis, which is for interval-ratio data when you are comparing two things you have measured (e.g., the amount of salt in the pot and how long it takes potatoes to cook). These three basic tests cover most of the types of inquiry studies we’ve seen grade 7–12 students conduct. This sample chapter also includes the Table of Contents, Foreword, and Index.