Bart scored 84 on his statistics midterm, and the class average was 85.What would his deviation and z score be in a distribution of the midterm grades?
A) It would be -1.
B) It would be 0.
C) It would be negative.
D) It would be positive.

Question

Quizplus · Accepted Answer

The deviation is calculated by finding the difference between Bart's score and the mean (85): 84 - 85 = -1. Since Bart's score is lower than the mean, his deviation is negative. The z score is calculated by dividing the deviation (-1) by the standard deviation of the population (which is not given in the problem): z = -1/SD. Since we do not know the value of the standard deviation, we cannot calculate the exact z score.

Bart Scored 84 on His Statistics Midterm, and the Class