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