71. Cross Tables and Scatter Plots

Lecture Resource: Exercise: Exercise solution : So far we have covered graphs that represent only one variable but how do we represent relationships between two variables. In this video we’ll explore cross tables and scatterplot. Once again we have a division between categorical and numerical variables. Let’s start with categorical variables. The most common way to represent them is using cross tables or as some statisticians call them contingency tables. Imagine you were an investment ma