If your grade on a test was determined by your standing relative to others in a class and you had a score of 90, what class should you most like to be in (hint: which one has the largest z score)?
A) Mean grade = 85, SD = 10
B) Mean grade = 83, SD = 5
C) Mean grade = 80, SD = 20
D) Mean grade = 90, SD = 5

Question

Quizplus · Accepted Answer

The z-score is calculated as (your score - mean) / standard deviation. For option B, the z-score is (90 - 83) / 5 = 1.4, which is the highest among the options, indicating you are further above the mean compared to other classes.

If Your Grade on a Test Was Determined by Your