Last week Sarah had exams in Math, Spanish, and English. On the Math exam, the mean was µ = 40 with σ = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was µ = 60 with s = 8, and Sarah had a score of X = 68. On the English exam, the mean was µ = 70 with s = 8, and Sarah had a score of X = 78. For which class should Sarah expect the better grade?
Select one:
a. Grades are the same.
b. English
c. Math
d. Spanish