Test scores for a Statistics class have a mean of 81 with a standard deviation of 4. Test scores for a calculus class had a mean of 75 with a standard deviation of 3.5. Suppose a student gets an 87 on...

Test scores for a Statistics class have a mean of 81 with a standard deviation of 4.

Test scores for a calculus class had a mean of 75 with a standard deviation of 3.5.

Suppose a student gets an 87 on the statistics test and
an 86 on the calculus test.

Calculate the z-scores for each test. On which test did the student perform better relative to the other students in the class.