Question

Recall that the scores in Mr. Young’s class had a mean of 78 and a standard deviation of 8. About what percent of students scored between 78% and 94%?

A. 47.5%
B. 34%
C. 13.5%
D. 68%

Answer 1

B. 34%.

Explanation:

94 - 78 = 16 which is 2 times the standard deviation from the mean.

For a normal distribution this is 34% of the total students.