AP Statistics practice test: free questions, exam format and 2027 date

The daily AP Statistics paper has 8 original questions worth 25 to 35 marks. It is good practice for Units 1, 2 and 5: data displays, center and spread, sampling, probability, the binomial and normal distributions, correlation and regression. Its significance tests use critical regions rather than the AP approach, and it has no confidence intervals or chi-square tests, so it doesn't cover Units 3 and 4 the way the AP exam does.

AP Statistics exam format for 2027

Unlike the AP science and calculus exams, AP Statistics is fully digital: you answer both sections in the Bluebook app, and your answers are submitted automatically at the end. College Board provides reference materials such as formula sheets and tables. The four free-response questions come in a fixed order: two multi-part questions, then one on inference, then one that mixes several content areas. That is about 2 minutes per multiple-choice question and about 22 minutes per free-response question.

AP Statistics units

Unit 1 is the biggest at up to 30%, and inference in Units 3 and 4 together can reach 45%. College Board recommends a first-year algebra course before you start. The tools: Histogram Maker, Box Plot Maker, Standard Deviation, Probability course, Confidence Interval, Hypothesis Test and Linear Regression.

AP Statistics practice test questions with answers

We wrote these for this page, one for each unit. In AP Statistics the words carry as many points as the numbers, so read the interpretations as closely as the calculations.

1. The normal distribution

Question: The heights of seedlings in a greenhouse are approximately normal with mean 24 cm and standard deviation 3 cm. What proportion are taller than 28.5 cm?

Standardize: z = (28.5 − 24) ÷ 3 = 1.5. The area to the right of z = 1.5 under the standard normal curve is 0.0668, so about 6.7% of seedlings. Show the distribution, the boundary and the direction, for example normalcdf with lower bound 28.5, mean 24 and SD 3, rather than only the calculator result.

Try a normal distribution question from our Probability course, then press Mark.

2. The binomial distribution

Question: 20% of a store's shoppers use a coupon. For a random sample of 10 shoppers, find the probability that exactly 3 use one, and the mean and standard deviation of the number who do.

The mean is np = 10 × 0.2 = 2 shoppers and the standard deviation is √(np(1 − p)) = √1.6 = 1.26. State why the binomial fits: a fixed number of independent trials, two outcomes, and the same probability each time.

3. A confidence interval for a proportion

Question: In a random sample of 900 voters, 540 support a new park. Construct and interpret a 95% confidence interval for the proportion of all voters who support it.

The interval is 0.568 to 0.632. Check the conditions first: a random sample, and at least 10 successes and 10 failures (540 and 360). Then interpret in context: we are 95% confident that between 56.8% and 63.2% of all voters support the park. The Confidence Interval Calculator checks the arithmetic.

4. Reading a significance test

Question: A test of H₀: p = 0.5 against Hₐ: p > 0.5 gives a p-value of 0.03. What do you conclude at α = 0.05?

Because 0.03 < 0.05, reject H₀: there is convincing evidence that the true proportion is greater than 0.5. Never say the test proves Hₐ, and never "accept" H₀ when the p-value is large: you fail to reject it.

5. Regression and residuals

Question: The least-squares line for quiz score against hours of study is ŷ = 12.5 + 3.2x, with r = 0.8. A student who studied 5 hours scored 32. Find the residual, interpret the slope and interpret r².

The predicted score is 12.5 + 3.2(5) = 28.5, so the residual is 32 − 28.5 = 3.5: this student scored 3.5 points above the line. The slope means the predicted score rises by 3.2 points for each extra hour of study. r² = 0.64, so 64% of the variation in quiz scores is explained by the linear relationship with hours studied. Use the Linear Regression Calculator to fit a line to your own data.

AP Statistics scores, date and deadlines

In 2026, 17% of AP Statistics students scored 5, 23% scored 4, 22% scored 3, 17% scored 2 and 21% scored 1, so 62% scored 3 or higher. College Board calls a 5 extremely well qualified, a 4 very well qualified and a 3 qualified, and each college sets its own credit policy.

• Exam: Tuesday, May 11, 2027, in the afternoon session, at 12 p.m. local time in the lower 48 states, Hawaii and Washington, D.C.
• Ordering deadline: November 13, 2026, through your school's AP coordinator. Your school may set an earlier date.
• Fee: $99 in the US, US territories and Canada, $129 elsewhere, plus $40 for exams ordered from November 14 to March 12.
• Scores: released in July 2027.

Use the daily paper as a short timed practice test

1. Open today's AP Statistics paper with a graphing calculator, and work to the suggested time, 35 to 45 minutes.
2. Write every answer in context, naming the variable and the population.
3. For each test, state the hypotheses and the conclusion in words, even where the paper uses critical regions.
4. Mark it, then practice confidence intervals and chi-square tests separately, because the paper doesn't include them.

Common AP Statistics mistakes

• Answering without context: "the mean is 4.2" earns less than "the mean wait time is 4.2 minutes".
• Skipping the conditions before an interval or a test.
• Saying a test proves something, or "accepting" the null hypothesis.
• Calling correlation causation: only a well-designed experiment shows cause and effect.
• Writing only calculator syntax: name the distribution and its parameters.
• Misreading a confidence level: 95% describes the method, not a 95% chance that this one interval contains the parameter.

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