a. The mean of a sample of 25 was calculated as x = 500. The sample was

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a. The mean of a sample of 25 was calculated as x̄ = 500. The sample was randomly drawn from a population with a standard deviation of 15. Estimate the population mean with 99% confidence.

b. Repeat part (a) changing the population standard deviation to 30.

c. Repeat part (a) changing the population standard deviation to 60.

d. Describe what happens to the confidence interval estimate when the standard deviation is increased.

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Statistics For Management And Economics Abbreviated

ISBN: 9781285869643

10th Edition

Authors: Gerald Keller

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Question Posted: Feb 03, 2015 08:49 AM

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a. The mean of a sample of 25 was calculated as x = 500. The sample was

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Statistics For Management And Economics Abbreviated

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