Carrie attained a score of 650 on the verbal section of her SAT. The mean grade was a 500 with a standard deviation of 100. What percentage of test takers scored below and above Carrie?
A)85 and 15
B)10 and 90
C)93 and 7
D)more information is required to answer this question

Question

Quizplus · Accepted Answer

Carrie's score is 1.5 standard deviations above the mean (650 - 500 = 150; 150 / 100 = 1.5). According to the empirical rule (or looking up a Z-table for a more precise value), approximately 93% of scores fall below a score that is 1.5 standard deviations above the mean, leaving about 7% scoring higher.

Carrie Attained a Score of 650 on the Verbal Section