MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The waiting time to get food at a fast-food restaurant is 4.7 minutes on average with a standard deviation of 2.5 minutes. Suppose that a sample of 32 customers is randomly selected.

A. What are the mean and standard deviation of the sample mean waiting time of 32 customers?

Mean = ____ minutes

Standard Deviation (standard error of the mean)

= ____ minutes Round standard error to 5 decimal places.

B. What is the probability that the average waiting time of 32 customers is less than 4.4 minutes?

Answer: ____ Round to 4 decimal places.

C. What is the probability that the average waiting time of 32 customers is greater than 4.8 minutes?

Answer: ____ Round to 4 decimal places.

D. What is the probability that the average waiting time of 32 customers is between 4.4 and 4.8 minutes?

Answer: ____ Round to 4 decimal places.
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Transcribed Image Text:The waiting time to get food at a fast-food restaurant is 4.7 minutes on average with a standard deviation of 2.5 minutes. Suppose that a sample of 32 customers is randomly selected. A. What are the mean and standard deviation of the sample mean waiting time of 32 customers? Mean = ____ minutes Standard Deviation (standard error of the mean) = ____ minutes Round standard error to 5 decimal places. B. What is the probability that the average waiting time of 32 customers is less than 4.4 minutes? Answer: ____ Round to 4 decimal places. C. What is the probability that the average waiting time of 32 customers is greater than 4.8 minutes? Answer: ____ Round to 4 decimal places. D. What is the probability that the average waiting time of 32 customers is between 4.4 and 4.8 minutes? Answer: ____ Round to 4 decimal places.
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