Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of72 and a standard deviation 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimals (a) Find the 32 percentile of the scores. (b) Find the 67 percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 8% of the class. What is the minimum score needed to get an A?

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Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 72 and a standard deviation of
8. Use the T1-84 PLUS calculator to answer the following. Round the answers to at least two decimals.
(a) Find the 32nd
percentile of the scores..
(b) Find the 67 percentile of the scores.
(c) The instructor wants to give an A to the students whose scores were in the top 8% of the class. What is the miniìmum score
needed to get an A?
(d) Between what two values are the middle 70% of the scores? (Enter the smaller number in the first box.)
Transcribed Image Text:Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 72 and a standard deviation of 8. Use the T1-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 32nd percentile of the scores.. (b) Find the 67 percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 8% of the class. What is the miniìmum score needed to get an A? (d) Between what two values are the middle 70% of the scores? (Enter the smaller number in the first box.)
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