FRQ Step 1 is always "name the procedure." Name the wrong one and every calculation after it scores zero. Answer the questions to route to the correct AP Statistics inference procedure (Fall-2026 CED).
Full tree overview
Try: "20 patients had their blood pressure measured before and after a drug — is the mean change different from 0?" Walk the tree: Quantitative → 2 paired samples → Matched-Pairs t. Then restart and try "two independent classes' mean test scores" → Two-Sample t.