Complete coverage of all 9 AP Statistics units — with visual explanations, worked examples, exam tips, and authentic MCQ & FRQ practice questions.
Distributions, shapes, center, spread, normal distribution, and summary statistics for a single quantitative or categorical variable.
📊 15–23% of ExamScatter plots, correlation, linear regression, residuals, and describing associations between two quantitative variables.
📊 5–7% of ExamStudy design, sampling methods (SRS, stratified, cluster), sources of bias, experimental design, and randomization.
📊 12–15% of ExamRules of probability, random variables, expected value, binomial distribution, and geometric distribution.
📊 10–20% of ExamCentral Limit Theorem, sampling distributions for means and proportions, and the foundations of statistical inference.
📊 7–12% of ExamConfidence intervals and significance tests for one and two proportions, Type I & II errors, and p-values.
📊 12–15% of Examt-procedures for one and two means, confidence intervals and significance tests, matched pairs design.
📊 10–18% of ExamGoodness of fit, homogeneity, and independence chi-square tests for categorical data with multiple categories.
📊 2–5% of ExamConfidence intervals and significance tests for the slope of a regression line, connecting regression to inference.
📊 3–6% of Examnormalcdf, invNorm, and z-score calculator with live curve visualization. Use alongside any unit.
🔢 Interactive Tool