AP Statistics
2A–2C Basics
Shared by Ashton · Nov 8, 2026 · 2 plays
AP Statistics Unit 2 quiz 2A–2C: two-way tables (marginal, joint and conditional relative frequencies), association, probability as long-run relative frequency, the law of large numbers, and the basic probability rules. 40 core-concept questions.
40 questions across 6 sections. After every answer you’ll see why each choice is right or wrong, not just the one you picked.
Sample questions
Open a question to see the answer choices and the correct answer.
What proportion of visitors are environmental club members?
- A. 305/1526 ≈ 0.200 ✓
- B. 212/1526 ≈ 0.139
- C. 305/1221 ≈ 0.250
- D. 212/305 ≈ 0.695
Correct answer: A. Marginal: the Yes column total over the grand total.
What proportion of visitors are members AND own a snowmobile?
- A. 16/305 ≈ 0.052
- B. 16/1526 ≈ 0.010 ✓
- C. 16/285 ≈ 0.056
- D. 285/1526 ≈ 0.187
Correct answer: B. Joint: one cell over the grand total.
Of the snowmobile renters, what proportion are NOT club members?
- A. 497/1526 ≈ 0.326
- B. 497/1221 ≈ 0.407
- C. 497/574 ≈ 0.866 ✓
- D. 574/1526 ≈ 0.376
Correct answer: C. "Of the renters" puts 574 on the bottom.
A relative frequency found by dividing a row or column TOTAL by the grand total is called a…
- A. Joint relative frequency
- B. Conditional relative frequency
- C. Cumulative relative frequency
- D. Marginal relative frequency ✓
Correct answer: D. It comes from the margins and describes one variable.
Which value tells you about only ONE of the two variables in a two-way table?
- A. A marginal relative frequency ✓
- B. A joint relative frequency
- C. A conditional relative frequency
- D. A segmented bar chart of the data
Correct answer: A. The slides say a marginal tells you about one variable only.