Four students take equivalent tests of statistics and after the test their papers were graded. Find the z-score for each and decide that which one has the highest relative score?

A. A score of 143 on a test with a mean of 126 and standard deviation of 22

B. A score of 192 on a test with a mean of 101 and standard deviation of 29.

C. A score of 198 on a test with a mean of 142 and standard deviation of 26.

D. A score of 158 on a test with a mean of 128 and standard deviation of 28.

8. The lowest relative score is? A,B,C,D

9. The highest relative score is? A,B,C,D

10. The most unusual relative score is? A,B,C,D