2023, Question 6 · Investigative Task, no longer on the exam · 4 points · about 25 minutes
Checking a gold-plating machine with tiny samples
Find normal probabilities for one necklace and for a mean of two, judge whether a sample result is surprising, describe simulated sampling distributions of the range, and decide whether the machine is off.
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 2023 exam. It starts on page 16 of the PDF.
Open Question 6 (PDF, page 16)
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 30) What the exam readers saw (Chief Reader report)
Question, scoring guidelines and Chief Reader report: College Board. The title and summary are ours.