# Unit 3: Additional Hypothesis Tests

In Unit 1, we learned the basics of statistics—what they are, how they work, and the mathematical and conceptual principles that guide them. In Unit 2, we applied these principles to the process and ideas of hypothesis testing—how we take observed sample data and use it to make inferences about our populations of interest—using one continuous variable and one categorical variable. In this final unit, we will continue to use this same hypothesis testing logic and procedure on new types of data. We will start with group mean differences on more than two groups, and then see how we can test hypotheses using only continuous data. We will wrap up this unit with a look at a different kind of test statistic: a nonparametric statistic for only categorical data.