The mean for statistics test scores is

63

and the standard deviation is

7.0

.

For the biology test scores, the mean is

25

and the standard deviation is

3.9

.

The test scores of a student who took both tests are given below.

A student gets a

72

on the statistics test and a

29

on the biology test.

(a) Transform each test score to a z-score.

(b) Determine on which test the student had a better score.