Get ready for AP Statistics, one unit at a time.

Find your weakest unit in a free 32-minute diagnostic, fix it with a short lesson, then practice in the 2027 format.

The only interactive course with a tutor that finds your weak spots and fixes them.

One payment in US dollars. Full refund within 14 days, for any reason.

The five units

The May 2027 exam: 42 multiple-choice questions and 4 free-response questions, 90 minutes each.

Unit 1

Graphs, summaries, outliers, sampling, bias and experiments.

20–30% of Section I

Unit 2

Two-way tables, probability rules, binomial and normal models.

15–25% of Section I

Unit 3

Confidence intervals, significance tests and chi-square.

15–25% of Section I

Unit 4

t intervals and t tests for one mean, pairs and two means.

10–20% of Section I

Unit 5

Scatterplots, correlation, least-squares lines and residuals.

10–20% of Section I

Start with a free 32-minute diagnostic

15 questions across all five units, no account. You get your score in each unit and a short lesson on the one to fix first.

Take the free diagnostic

Try one question from each unit

Question 1
Researchers recorded the daily step counts of 500 adults who chose to use a standing desk at work and 500 who did not. Those with standing desks walked more. Which conclusion is justified?
Question 2
A screening test for a condition is positive for 95% of people who have it and for 10% of people who do not. 2% of the people screened have the condition. If a person tests positive, what is the probability that they have the condition?
Question 3
A test of H₀: p = 0.5 against Hₐ: p > 0.5 gives a p-value of 0.03. Which interpretation is correct?
Question 4
Twelve students each took a reading test before and after a summer program. To estimate the mean improvement, which procedure is appropriate?
Question 5
A point has a residual of −3.2 on a least-squares line. What does this mean?

Write a free-response answer, get it marked

Type your answer to a full 10-point question. Each point comes back earned or missed, with the words that earned it.

Try a free-response question

In the course

  • 29 interactive lessons
  • 130 practice questions
  • 14 free-response questions with point-by-point feedback
  • 2 full practice exams

See the course

Guides

Statistics Genius Pro

US$89one payment

  • 29 interactive lessons
  • 130 practice questions
  • 14 free-response questions with point-by-point feedback
  • 2 full practice exams

Full refund within 14 days. Ask within 14 days of paying, for any reason. Terms

By paying you agree to our Terms. Email us within 14 days for a full refund.
Take the free diagnostic first

Apple Pay, Google Pay or card. Charged in USD.
One payment. No sales tax is added. Access until October 31, 2027.