An English professor assigns letter grades on a test according to the following scheme. A: Top 13% of scores B: Scores below the top 13 % and above the bottom 61 % C: Scores below the top 39 % and above the bottom 22 % D: Scores below the top 78 % and above the bottom 6% F: Bottom 6% of scores Scores on the test are normally distributed with a mean of 75.1 and a standard deviation of 9.1. Find the numerical limits for a D grade. Round your answers to the nearest whole number, if necessary.
An English professor assigns letter grades on a test according to the following scheme. A: Top 13% of scores B: Scores below the top 13 % and above the bottom 61 % C: Scores below the top 39 % and above the bottom 22 % D: Scores below the top 78 % and above the bottom 6% F: Bottom 6% of scores Scores on the test are normally distributed with a mean of 75.1 and a standard deviation of 9.1. Find the numerical limits for a D grade. Round your answers to the nearest whole number, if necessary.
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
Transcribed Image Text:An English professor assigns letter grades on a test according to the following scheme.
A: Top 13% of scores
B: Scores below the top 13 % and above the bottom 61 %
C. Scores below the top 39 % and above the bottom 22 %
D: Scores below the top 78 % and above the bottom 6%
F: Bottom 6% of scores
Scores on the test are normally distributed with a mean of 75.1 and a standard deviation of 9.1. Find the numerical limits for a D grade. Round your
answers to the nearest whole number, if necessary.
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