Review AP Statistics with unit study guides, practice questions, and FRQ practice across the five-unit Fall 2026 course framework. Use these AP Stats resources to practice data collection, probability, inference for proportions and means, regression analysis, calculator work, and written statistical justification for the current exam.
AP Statistics teaches you to collect, explore, and reason about real-world data, then build formal inference like confidence intervals and hypothesis tests while clearly justifying every conclusion.
Get the big picture: what AP Statistics covers, how it is scored, and how the units connect.
read the overviewAnswer a quick mix of questions to see which units need the most review.
start a diagnosticOpen the unit you are studying now and review its guides, practice, and key terms.
browse all 5 unitsAP Statistics, often searched as AP Stats, teaches you to make sense of real-world data by asking statistical questions, collecting trustworthy data, analyzing variation, and interpreting results in context. The revised course begins with one-variable data and data collection, then builds probability models, random variables, inference for proportions and means, and regression analysis.
The emphasis is on more than running numbers. You choose appropriate methods, verify conditions, interpret calculator output, and justify conclusions in writing. By the end, you can look at data, describe what it shows, and defend a claim about a larger population using sound statistical reasoning.
Represent and compare one-variable data using graphs, percentiles, and summary statistics
Design studies with random sampling and experiments to support valid conclusions
Apply probability rules, random variables, and probability distributions
Construct and interpret confidence intervals and hypothesis tests for proportions
Construct and interpret confidence intervals and hypothesis tests for means
Analyze linear relationships with correlation, regression, residuals, and inference for slope
The AP Statistics exam is 3 hours long. Section I has 42 multiple-choice questions in 90 minutes and Section II has four 10-point free-response questions in 90 minutes. Each section is worth 50% of the total score.
| Section | Questions | Time | % of Score |
|---|---|---|---|
| Section I – Multiple Choice | 42 | 90 min | 50% |
| Section II – Free Response | 4 | 90 min | 50% |
Total timed testing time: 180 minutes.
The course is organized into 5 units. Each percentage is that unit's published AP® weighting for the multiple-choice section, so you can see which units carry the most points. College Board publishes most of these as ranges, so they are not meant to total 100%. Open each unit for its study guide, topic pages, key terms, and practice questions.
Review Exploring One–Variable Data and Collecting Data with topic guides, practice questions, and key terms.
Review Probability, Random Variables, and Probability Distributions with topic guides, practice questions, and key terms.
Review Inference for Categorical Data: Proportions with topic guides, practice questions, and key terms.
Review Inference for Quantitative Data: Means with topic guides, practice questions, and key terms.
Review Regression Analysis with topic guides, practice questions, and key terms.
These trends come from real Fiveable practice data, so you can see what students are reviewing, which topics need extra attention, and how written practice can improve over time.
Miss rate is based on high-volume AP Statistics multiple-choice practice.
Average MCQ accuracy by student practice volume across 2,101 AP Statistics students.
Among AP Statistics FRQ responses that students retried on Fiveable, average scores rose from 41% on the first attempt to 72% on the latest attempt.
practice AP Statistics FRQs →These guides collect important exam skills, big ideas, essay tasks, and other subject-specific resources.
Treat AP Stats as a course about reasoning with data, not a formula-memorization class. Work the units in order so data collection and probability foundations are solid before inference. After each unit, practice interpreting graphs, calculator output, probability results, intervals, and p-values in context. The biggest score difference comes from writing, so practice complete free-response answers that state the method, show evidence, and conclude using the problem context.
Week 1: Review Unit 1 data displays, summary statistics, percentiles, sampling, and experiments
Week 2: Lock in Unit 2 probability rules, random variables, expected value, and distributions
Week 3: Practice Unit 3 confidence intervals and hypothesis tests for categorical data and proportions
Week 4: Practice Unit 4 confidence intervals and hypothesis tests for quantitative data and means
Week 5: Review Unit 5 regression, residuals, prediction, and inference for slope
Week 6: Take timed mixed MCQ sets and four-question FRQ sets, then review every missed condition and interpretation
Use the question types below to plan written-response practice and connect exam guides to timed FRQs. Open an example prompt to practice that question type right away.
| Question | Focus | Points | % of Score | Example prompt |
|---|---|---|---|---|
| FRQ 1 | Multi-Focus on Practices 1 and 2 | 10 | 13% | Rapid transit commute time comparison study |
| FRQ 2 | Multi-Focus on Practices 3 and 4 | 10 | 13% | Low-flow showerhead water flow rate comparison |
| FRQ 3 | Inference | 10 | 13% | Public transit usage estimation and hypothesis testing |
| FRQ 4 | Multi-Focus on Practices 2, 3, and 4 | 10 | 13% | Bus arrival reliability and weather conditions |
Find every unit and topic guide in one place.
AP® Statistics covers data analysis, sampling and experimental design, probability, random variables, inference, and statistical reasoning.
Use the unit guides to review each major concept, then work through AP®-style practice to strengthen interpretation, setup, and calculator-supported reasoning.
Fiveable's AP® Statistics FRQ practice includes AP®-style free-response questions with AI-supported scoring so you can practice showing work, explaining conditions, and interpreting results.
Start with the units where you lose points most often, especially inference or probability. For exam review, focus on describing the setup clearly before worrying about every calculation detail.