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 size n = 49 customers is observed. Find the
probability that the average time waiting in line for these customers is Less than
10 minutes. ?
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A random sample of n = 36 is selected from this population. Find the probability that the sample mean is greater than 2.1 but less than 2.5, assuming that the sample mean would be measured to the nearest tenth. 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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