A teacher informs his computational physics class (of 500+ students) that a test was very difficult, but the grades would be curved. Scores on the test were normally distributed with a mean of 41 and...

Extracted text: A teacher informs his computational physics class (of 500+ students) that a test was very difficult, but the grades would be curved. Scores on the test were normally distributed with a mean of 41 and a standard deviation of 5.1. The maximum possible score on the test was 100 points. Because of partial credit, scores were recorded with 1 decimal point accuracy. (Thus, a student could earn a 41.8, but not a 40.57.) The grades are curved according to the following scheme. Find the numerical limits for each letter grade. Interval Letter Scheme Top 10% A Scores above the bottom 67% B and below the top 10% Scores above the bottom 33% and below the top 33% Scores above the bottom 10% D and below the top 67% F Bottom 10%