This practice set contains 20 hard, high-discrimination multiple-choice questions in the style of the AP Statistics exam, focused on the concepts and calculations that most frequently cause errors: conditional probability, sampling distributions, inference procedures, confidence-interval and p-value interpretation, regression, chi-square, and experimental design.

Select the best answer for each question. As soon as you choose an answer, the correct answer and a full explanation will appear beneath the question — use this to study, not just to check. You may reset any question with the "Try again" button. A graphing calculator (Desmos) is available at the bottom-right of the screen.

Use the numbered palette at the bottom of the screen to jump to any question. When you are finished, use "Print Test" for a blank, answer-free copy to redo later, or "Print Answer Key" for a version showing every correct answer and explanation.