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An English professor assigns letter grades on a test according to the following scheme. A: Top 9% of scores B:...

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Question

Statistics

An English professorassigns letter grades on a test according to the followingscheme.

A: Top 9% ofscores

B: Scores below thetop 9% and above the bottom 63%

C: Scores below thetop 37% and above the bottom 22%

D: Scores below thetop 78% and above the bottom 6%

F: Bottom 6% ofscores

Scores on the test arenormally distributed with a mean of 66.9 and a standard deviationof 9.2. Find the numerical limits for a D grade. Round your answersto the nearest whole number, if necessary.

Answer

2 Points

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numerical limit 1 and numerical limit 2

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