21
(Choose 1 answer)
The scores of a final exam in Math are normally distributed with mean of 73 with standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is greater than 78.
Let P(Z < 3.14) = 0.9992, P(Z < 1.26) = 0.8962.
A. 0.9992
B. 0.8962
C. 0.1038
D. 0.0008
E. None of the other choices is correct
