Chapter 4: Describing the Relationship Between Two Variables
In Chapter 3, we looked at numerically summarizing data from one variable (univariate data), but newspaper articles and studies frequently describe the relationship between two variables (bivariate data). It's this second class that we'll be focusing on in Chapter 4.
There are plenty of variables which seem to be related. The links below are articles from various news sources, all discussing relationships between two variables.
Do
SAT Scores Really Predict Success?
Range of Variables Affect How SAT Correlates to College GPA
Our goal in this chapter will be to find ways to describe relationships like the one between a student's SAT score and his/her GPA, and to describe the strength of that relationship.
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