AP Statistics / Unit 2: Probability, Random Variables, and Probability Distributions
2.1 Tabular and Graphical Representations for the Distributions of Two Categorical Variables
Notes
A two-way table counts individuals by two categorical variables.
- Side-by-side, segmented and mosaic bar graphs compare distributions.
Practice
In a two-way table of grade level by favorite sport, the row and column totals give:
Totals in the margins.
A segmented bar graph where each bar sums to 100% shows:
Each bar is one group's breakdown.
Two-way tables are used for:
Rows and columns are categories.
Ready for more? Take the Unit 2 test.