Categorical variable: distributions and proportional thinking
Learning objectives
- Interpret a bar chart or pie chart: we display categorical data using the area principle in either a bar chart or a pie chart.
- Understand what distributions mean in the context of categorical variables.
- Be familiar with proportional thinking
- Interpret a contingency table: when we want to see how two categorical variables are related, we put the counts (and/or percentages) in a two-way table called a contingency table.