At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 75

and a standard deviation of 12. The scores on the calculus final are also approximately normally distributed,

with a mean of 80 and a standard deviation of 8. A student scored 81 on the chemistry final and 84 on the

calculus final. Relative to the students in each respective class, in which subject did this student do better?

A. The student did better in chemistry.

B. The student did better in calculus.

C. The student did equally well in each course.

D. There is no basis for comparison, since the subjects are different from each other and

are in different departments.

E.There is not enough information for comparison, because the number of students in each class is not

known.

10. Kevin got an 80 on his most recent test and calculated his z-score to be 2=-27 . Which of the following

statements must be correct?

A. Kevin did worse than at least 50% of the class.

B.Kevin scored below the average of the class.

Mr. Brown did not grade correctly. Kevin would never have a negative z-score.

D.Kevin's percentile rank in the class was the 39* percentile.

E.The distribution of scores is skewed left.