The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is unknown. However, records indicate that the mean time is 16.1 minutes, and the standard deviation is 4 5 minutes Complete parts (a) through (c). (a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required? O A. The sample size needs to be less than or equal to 30. O B. The sample size needs to be greater than or equal to 30. O C. The normal model cannot be used if the shape of the distribution is unknown. O D. Any sample size could be used.

The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is unknown. However, records indicate that the mean time is 16.1 minutes, and the standard deviation is 4 5 minutes Complete parts (a) through (c). (a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required? O A. The sample size needs to be less than or equal to 30. O B. The sample size needs to be greater than or equal to 30. O C. The normal model cannot be used if the shape of the distribution is unknown. O D. Any sample size could be used.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is unknown. However, records indicate that the mean time is 16.1 minutes, and the standard deviation is 4.5 minutes Complete
parts (a) through (c).
(a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required?
O A. The sample size needs to be less than or equal to 30
O B. The sample size needs to be greater than or equal to 30.
O C. The normal model cannot be used if the shape of the distribution is unknown
O D. Any sample size could be used.
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