AP Statistics practice problems, unit by unit
Free AP Statistics practice problems for the revised 2026-27 course, all five units, written by our tutors in the style of the new exam. Each question has a hint and a worked solution you reveal one step at a time, and each unit ends with a 10-point free-response question with a scoring guide, as on the exam from May 2027.
On this page
Practice by unit
- Unit 1: Exploring one-variable data and collecting dataDescribing distributions, z-scores and the normal model, sampling methods and bias, and the design of experiments. 8 questions and a free-response question.
- Unit 2: Probability, random variables and probability distributionsProbability rules, conditional probability and independence, discrete random variables, the binomial distribution, and sampling distributions. 8 questions and a free-response question.
- Unit 3: Inference for categorical data: proportionsConfidence intervals and significance tests for one proportion and for the difference of two proportions, with their conditions and interpretation. 8 questions and a free-response question.
- Unit 4: Inference for quantitative data: meanst intervals and t tests for one mean, the difference of two means, and paired data, with their conditions and interpretation. 8 questions and a free-response question.
- Unit 5: Regression analysisScatterplots, correlation, the least-squares regression line, residuals and r<sup>2</sup>, and the cautions of extrapolation and influential points. 8 questions and a free-response question.
Ready for a full test? Take the free AP Statistics mock exam: every unit, timed, marked as you go.
How it works
- Try first. Type your answer or pick an option, and it is marked straight away.
- Stuck? Open the hint before the solution. Then reveal the worked solution one step at a time, and stop as soon as you can finish it yourself.
- Mark your free-response answers with the scoring guide, point by point, the way exam readers do.
- Track your progress. Each unit above shows how many questions you have done, saved on this device.
- Share it with your tutor. Every unit page has a button that sends your score on WhatsApp. Tutors: send a unit link as homework, and ask for the score back.
The AP Statistics exam format
| Section | Questions | Time | Score |
|---|---|---|---|
| Section I: multiple choice | 42 questions, four answer choices each | 1 hour 30 minutes | 50% |
| Section II: free response | 4 questions, 10 points each | 1 hour 30 minutes | 50% |
This is the format from the May 2027 exam onwards, when AP Statistics becomes fully digital in the Bluebook app, with a graphing calculator allowed throughout. The revised course has five units and drops four topics: combining random variables, the geometric distribution, the chi-square goodness-of-fit test and inference for slopes.
Frequently asked questions
Are these AP Statistics questions from real exams?
No. They are original questions written by our tutors in the style of the AP Statistics exam, so we can give full worked solutions. For real exam questions, use the official AP Statistics past papers, which we link to with their scoring guidelines.
Do I need an account?
No. Everything is free and there is no sign-up. Your progress is saved in your own browser on this device, and you can reset it on any unit page.
How should I use these alongside past papers?
Use the unit practice while you learn each topic, then move to timed past papers once you have covered most of the course. When a past paper question goes wrong, come back to that unit's questions.
Are these questions for the new AP Statistics course?
Yes. They follow the five units of the revised 2026-27 course and leave out the four removed topics. Older resources often still include them.
How are the free-response questions marked?
Each of the four free-response questions on the new exam is worth 10 points. Our scoring guides split the 10 points across the parts, the way the official guidelines do.