Chapter 4: Describing Two Variables at a Time

Overview

Two-by-Two: Bivariate Data

Describing Covariation: Two Categorical Variables

A Digression: Recoding a Variable and Changing Value Order

Describing Covariation: One Continuous, One Categorical Variable

Describing Covariation: Two Continuous Variables

Scatter Plots for Very Large Data Tables

More Informative Scatter Plots

Application

Overview

Some of the most interesting questions in statistical inquiries involve covariation: how does one variable change when another variable changes? After working through the examples in this chapter, you will know some basic approaches to bivariate analysis, that is, the analysis of two variables at a time.

Two-by-Two: Bivariate Data

Chapter 3 covered ...

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