Question 749953
z = (x - mu)/(sigma)


z = z score
x = observed value
mu = mean
sigma = standard deviation


psychology:
z = (76 - 88)/(10) = -1.2


economics:
z = (33 - 47)/5 = -2.8


The psychology test score is relatively better because its z-score is greater than the z-score of the economics test.