Solved: The amount of time that a customer spends waiting at an airport check-in counter
Chapter 7, Problem 7-42(choose chapter or problem)
The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.2 minutes and standard deviation 1.5 minutes. Suppose that a random sample of n 49 customers is observed. Find the probability that the average time waiting in line for these customers is (a) Less than 10 minutes (b) Between 5 and 10 minutes (c) Less than 6 minutes
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