A random sample of 8 observations was drawn from a normal population. The sample mean and sample

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A random sample of 8 observations was drawn from a normal population. The sample mean and sample standard deviation are x̄ = 40 and s = 10.

a. Estimate the population mean with 95% confidence.

b. Repeat part (a) assuming that you know that the population standard deviation is σ = 10.

c. Explain why the interval Estimate produced in part (b) is narrower than that in part (a).

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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 09:17 AM

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A random sample of 8 observations was drawn from a normal population. The sample mean and sample

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a 40 2365108 40 836 LCL 3164 UCL 4836 b ...View the full answer

Statistics For Management And Economics Abbreviated

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