AP Statistics practice
31 original lessons and 168 questions with hints and worked feedback. Practice and save progress on your own device.
Topics you can study
- Exploring One-Variable Data and Collecting Data: Investigative questions, individuals, and variables; Categorical frequency tables and displays; Quantitative displays and distribution descriptions; Center, spread, boxplots, and comparative claims; Investigative questions, data sources, and ethical collection; Sampling design and sources of bias; Experimental design, assignment, and warranted conclusions.
- Probability, Random Variables, and Probability Distributions: Two-way tables and categorical association; Simulation design and probability estimation; Complements, unions, conditional probability, and independence; Discrete distributions, expected value, and variability; Binomial model conditions, calculations, and interpretation; Normal models, standardized positions, and inverse probability; Sampling distributions, randomization distributions, and CLT.
- Inference for Categorical Data: Proportions: Estimators and sample-proportion distributions; One-proportion confidence intervals and claims; One-proportion hypotheses, test statistics, and p-values; Testing errors, power, and sample-size tradeoffs; Two-proportion distributions, intervals, and comparative claims; Two-proportion tests and pooling under equality; Chi-square homogeneity and independence tests.
- Inference for Quantitative Data: Means: Sampling distributions of means and standard errors; One-mean t intervals and mean-difference pairing; One-mean t tests and contextual evidence; Paired design and inference on differences; Independent-mean differences and t intervals; Independent two-mean tests and method selection.
- Regression Analysis: Scatterplots, correlation, and association claims; Linear models, predictions, and coefficient interpretation; Residuals, model checks, and unexplained variation; Least squares, explained variation, and fitting.
How practice works
Use mixed practice or focus on a chapter. Multiple-choice and numeric responses receive objective feedback. Written, graph and code responses use an analytic self-review checklist; code is not compiled and graph work is not automatically graded.
Coverage and review
Formative original practice aligned to the preparation topic map. This is an incomplete preparation beta with provisional difficulty, written self-review and no official score prediction.
Original questions and lessons have independent AI review. Human academic approval, empirical difficulty calibration and measured score improvement are not established. Our examples and questions are not official assessment items. Read the full practice scope.
What is free?
All included questions, explanations, lessons, normal practice and question reporting are free. The optional Apple Practice Toolkit adds custom controls across the courses included in that app version. The purchase does not include future courses, tutoring, AI or cloud services.
Specification sources
- College Board course framework and current unit weights — specification facts checked 2026-10-02.
- College Board course topic outline — specification facts checked 2026-10-02.
- College Board current May 2027 exam format — specification facts checked 2026-10-02.