Question

A student took two national aptitude tests. The national average and standard deviation were 675 and 100, respectively, for the first test and 50 and 6, respectively, for the second test. The student scored 725 on the first test and 65 on the second test. Use z scores to determine on which exam the student performed better relative to the other test takers.

a. First exam
b. Second Exam

Answer 1

Below

Explanation:

First exam scored 50 pts above average

this is 50 / 100 = z score = + .5

Second exam scored 15 points above average

this is z score of 15 / 6 = + 2.5

Did better on second exam