Sally is asked 10 questions and is told to give her answer in intervals such that $5 \%$ of the time the correct answer fell above the interval and $5 \%$ of the time the answer fell below the interval. The experimenter concludes that Sally is calibrated. For how many questions did the true answer fall within Sally's given intervals?
A) 9
B) 5
C) 10
D) 8

Question

Quizplus · Accepted Answer

Sally is calibrated, which means that her answers are accurate within a certain range. The experimenter has told her to give her answers in intervals such that $5 \%$ of the time the correct answer fell above the interval and $5 \%$ of the time the answer fell below the interval. This means that the correct answer should fall within the given interval $90 \%$ of the time. Since Sally is asked 10 questions, the correct answer should fall within her given intervals 9 times.

Sally Is Asked 10 Questions and Is Told to Give 5%5 \%5%

Sally Is Asked 10 Questions and Is Told to Give $5 \%$