Inference for categorical data

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Chapter 6 Inference for categorical data

In this chapter, we apply the methods and ideas from Chapter 5 in several contexts for categorical data. We’ll start by revisiting what we learned for a single proportion, where a normal distribution can be used to model the uncertainty in the sample proportion. Next, we apply these same ideas to analyze the difference of two proportions using a normal model. Later in the chapter we will encounter contingency tables, and we will use a different distribution, though the core ideas of hypothesis testing remain the same.

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