The average sales per customer at a home improvement store during the past year is $75 with a standard deviation of $12 . The probability that the average sales per customer from a sample of 36 customers, taken at random from this population, exceeds $78 is:
a. 0.4332.
b. 0.0668.
c. 0.0987.
d. 0.9013.
e. 0.5000
B
Business
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