A local pizza shop claims its average home delivery time is 30 minutes. A sample of 40

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A local pizza shop claims its average home delivery time is 30 minutes. A sample of 40 deliveries had a sample average of 33 minutes. Assume the population standard deviation for the shop’s deliveries is 6.5 minutes.

a. Is there support for the shop’s claim using the criteria that were previously discussed?

b. Identify the symmetrical interval that includes 95% of the sample means if the true population mean is 30 minutes.

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Business Statistics

ISBN: 9780321925121

2nd Edition

Authors: Robert A. Donnelly

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Question Posted: Jul 17, 2015 03:16 AM

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A local pizza shop claims its average home delivery time is 30 minutes. A sample of 40

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a Thus theres less than a 1 chance of observing a sample mean as high as 33 minu...View the full answer

Business Statistics

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