Sampling, inference, regression, and the dreaded chi-squared.
Real Test
Full-length test
40 questions, 90 min countdown. Same length and pacing as the real exam.
Warmup
Quick practice
Random questions across all topics. No timer, just reps.
Targeted
Practice by topic
Drill one skill until it stops scaring you.
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Exam blueprint
40 MCQ + 6 FRQ. Major format changes coming for 2027.
Unit 1Exploring One-Variable Data15–23%
Unit 2Exploring Two-Variable Data5–7%
Unit 3Collecting Data12–15%
Unit 4Probability, Random Variables, and Probability Distributions10–20%
Unit 5Sampling Distributions7–12%
Unit 6Inference for Categorical Data: Proportions12–15%
Unit 7Inference for Quantitative Data: Means10–18%
Unit 8Inference for Categorical Data: Chi-Square2–5%
Unit 9Inference for Quantitative Data: Slopes2–5%
Source: College Board Course & Exam Descriptions, 2025–26.