The length of time for one individual to be served at
a cafeteria is a random variable having a normal distribution with
a mean of 10 minutes and a standard deviation of 2 minutes. If the
service time differs from the mean at most d minutes, he classifies
this visit as a happy visit. What should be d so that 95% of his
visits will be classified as happy?
Select one:
A. 3.56
B. 5.76
C. 4.48
D. 2.48
E. 3.3
F. 3.92
G. 5.02
H. 2.9
TOPIC:Normal distribution.
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