Waiting Time at a Bank Drive-in Window The average waiting
Chapter 6, Problem 13(choose chapter or problem)
Waiting Time at a Bank Drive-in Window The average waiting time at a drive-in window of a local bank is 10.3 minutes, with a standard deviation of 2.7 minutes. Assume the variable is normally distributed. If a customer arrives at the bank, find the probability that the customer will have to wait a. Between 4 and 9 minutes 0.3057 b. Less than 5 minutes or more than 10 minutes 0.5688 c. How might a customer estimate his or her approximate waiting time?
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