4 Describing Two Variables at a Time
Describing Covariation: Two Categorical Variables
Describing Covariation: One Continuous, One Categorical Variable
Describing Covariation: Two Continuous Variables
More Informative Scatter Plots
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 techniques for summarizing the variation of a single variable: Univariate distributions. In many statistical investigations, ...
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