Z-scores and Normal Distribution (non-calculus based)
Channel: Robert Foth
Date: 2011-09-28

A teacher with a large class finds that the class had exam scores that were forminig a bell shape curve. The teacher releases these results to the students. The average was a 77% with a standard deviation of 16%. Answer the following.

What percent of the class scored below a passing grade of 70%?

What percent of the class scored above a 90%?

What percent of the class scored between a 70% and 90%?