Legacy / enrichment

Study the geometric model as legacy AP Statistics enrichment while clearly separating it from the revised 2026–27 tested course.

Binomial vs geometric distribution explained with model-choice rules, formulas, legacy AP context, examples, and focused practice.

Binomial and geometric practice problems with worked legacy comparisons, model-selection drills, calculations, and answer explanations.

The chi square goodness of fit test compares one categorical variable’s observed counts with a fully specified distribution of expected proportions. College Board removed this procedure from the revised AP Statistics course beginning in 2026–27, so this page is retained for older released material, enrichment, and college-statistics continuity.

Legacy regression-slope inference guide for older AP/college materials, with worked cases, t procedures, interpretation, and current-course status.

36 visible MCQs, 14 FRQ sets, formulas, worked answers, and direct links to the complete AP Statistics practice system.