?Burger King’s Drive-Through Suppose that cars arrive at Burger King’s drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 p.m.
Chapter 8, Problem 28(choose chapter or problem)
Burger King’s Drive-Through Suppose that cars arrive at Burger King’s drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 p.m. A random sample of 40 onehour time periods between 12:00 noon and 1:00 p.m. is selected and has 22.1 as the mean number of cars arriving.
(a) Why is the sampling distribution of approximately normal?
(b) What is the mean and standard deviation of the sampling distribution of assuming that μ = 20 and σ =
?
(c) What is the probability that a simple random sample of 40 one-hour time periods results in a mean of at least 22.1 cars? Is this result unusual? What might we conclude?
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