a random sample of 130 items is drawn from a population whose standard deviation is known to

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a random sample of 130 items is drawn from a population whose standard deviation is known to be o=60. The sample mean is x=70.

a) Construct an interval estimate for u with 95 percent confidence. (round to 1 decimal place)

The 95% confidence interval is from to

b) Construct an interval estimate for u with 95 percent confidence, assuming that o-120.

The 95% confidence interval is from to

c) Construct an interval estimate for u with 95 percent confidence that o=240.

The 95% confidence interval is from to

d) Describe how the confidence interval changes as o increases.

Related Book For answer-question

Applied Statistics In Business And Economics

ISBN: 9780073521480

4th Edition

Authors: David Doane, Lori Seward

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Posted Date: Mar 27, 2024 01:12 PM

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a random sample of 130 items is drawn from a population whose standard deviation is known to

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Confidence Intervals for Population Mean u We can estimate the population mean u with a confidence i... View the full answer

Applied Statistics In Business And Economics

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