A professor finds that the students scored a 76 ± 8 (M ± SD)on the final exam.On this exam,a score of 90 is an A. Assuming these data are normally distributed, what is the z score for 90 (the cutoff for an A)?
A) 1.75
B) 1.50
C) 1.25
D) There is not enough information to answer this question.

Question

Quizplus · Accepted Answer

The z score is calculated using the formula z = (X - M) / SD, where X is the score of interest (90), M is the mean score (76), and SD is the standard deviation (8). Plugging in the values: z = (90 - 76) / 8 = 14 / 8 = 1.75.

A Professor Finds That the Students Scored a 76 ±