AP Statistics / Unit 1: Exploring One-Variable Data and Collecting Data
1.4 Graphical Representations for One Categorical Variable
Notes
- Bar graphs show counts or proportions with separated bars.
- Pie charts show parts of a whole.
Practice
Best graph for favorite music genre:
One categorical variable.
A pie chart only makes sense when:
Slices must add to 100%.
A bar graph with a $y$-axis that starts at 50 instead of 0 can:
Truncated axes mislead.
Ready for more? Take the Unit 1 test.