Last week Tim got a score of X = 54 on a math exam with µ = 60 and σ = 8.He also got X = 49 on an English exam with µ = 55 and σ = 3,and he got X = 31 on a psychology exam with µ = 37 and σ = 4.For which class should Tim expect the best grade?
A)Math
B)English
C)Psychology
D)All 3 grades should be the same.

Question

Quizplus · Accepted Answer

Tim's math score is closest to the mean in terms of standard deviations, as his z-score for math is -0.75, which is higher than his z-scores for English (-2) and psychology (-1.5).

Last Week Tim Got a Score of X = 54