Distribution of Grades on Quiz II, 1996

--- Class Ave: 57; Standard Deviation: 23 ---

Histogram of Quiz scores: # of students in each range vs quiz grade.

The bins (from left to right) correspond to grades of D, C, B, A and A+, respectively.

The numerical assignment of letter grades would be roughly as follows:

• D: 0 - 22
• C: 23 - 44
• B: 45 - 67
• A: 68 - 89
• A+: 90 - 100