Mathematics

Hahn

29 October, 05:55

A psychology professor assigns letter grades on a test according to the following scheme. A: Top 8% of scores B: Scores below the top 8% and above the bottom 61% C: Scores below the top 39% and above the bottom 16% D: Scores below the top 84% and above the bottom 8% F: Bottom 8% of scores Scores on the test are normally distributed with a mean of 65.4 and a standard deviation of 9.7 Find the numerical limits for a D grade. Round your answers to the nearest whole number, if necessary.