If a particular population characteristic is normally distributed with a mean of 80 and a variance of 81, given a sample size of 9, the probability of a sample average being in excess of 84.5 is ____________

Select one:

a. In excess of 0.50 but not in excess of 0.90

b. Not in excess of 0.05

c. In excess of 0.05 but not in excess of 0.1

d. In excess of 0.90

e. In excess of 0.10 but not in excess of 0.50