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Question 10 The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.1 minutes and

Question 10
The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.1 minutes and standard deviation 1.5 minutes. Suppose that a random sample of / = 45 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 Round your answers to four decimal places (e.g. 0.9876). (a) The probability is i (b) The probability is i (c) The probability is i atic

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