This set collects the exact question types that Korean AP Statistics students miss most often — confidence interval and p-value misinterpretation, Welch two-sample procedures, chi-square expected counts, and the independence-vs-mutually-exclusive trap. Every numeric answer was calculated and verified three times (Python/SciPy computation, manual re-derivation, and internal consistency check against the distractors) before being included.
Work every problem on scratch paper before selecting an answer — once you select a choice, the correct answer and full explanation are revealed immediately and the question locks. Use the Desmos calculator (bottom right) for any computation, exactly as permitted on the real exam.