Lesson PreviewLesson 4 of 6 in this unit
Part of Inference for Categorical Data: Chi-Square in AP® Statistics. Read the opening section, then create a free account for the full interactive lesson, practice, and progress tracking.
A two-way table
Example:
| Likes Math | Doesn't Like Math | Total | |
|---|---|---|---|
| Freshman | 30 | 20 | 50 |
| Sophomore | 25 | 35 | 60 |
| Junior | 40 | 50 | 90 |
| Total | 95 | 105 | 200 |
Joint frequency Marginal frequency Conditional distribution
For example: Among Freshmen, 30/50 = 60% like math. Among Sophomores, 25/60 ≈ 41.7% like math.
6 lessons
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Stellar