2022, Question 6 · Investigative Task, no longer on the exam · 4 points · about 25 minutes
Allergy clinics and a reversed comparison
Turn a two way table into conditional relative frequencies to pick the better clinic, explain why the observational design blocks a causal claim, then use a mosaic plot split by allergy severity to explain why the comparison flips.
This exam had six free-response questions, each scored from 0 to 4. Its Question 6, the Investigative Task, is no longer part of the exam. The current exam has 4 free-response questions in 90 minutes. The skills these questions practice still count.
1 Read the question
The question is College Board's, from the 2022 exam. It starts on page 14 of the PDF. College Board no longer posts this exam, so it opens from the copy of College Board's PDF that the Internet Archive saved on May 11, 2026.
Open Question 6 (PDF, page 14)
2 Write your answer
Answer each part the way you would on the exam, in full sentences, with your work shown. Your writing saves as you type.
3 Score it
Score your answer against College Board's scoring guidelines, one point at a time. Give yourself a point only when your answer says what the guideline asks for.
Scoring guidelines (PDF, page 29) What the exam readers saw (Chief Reader report)
Question, scoring guidelines and Chief Reader report: College Board, from the Internet Archive. The title and summary are ours.