Suppose x has a mound-shaped distribution with = 9. A random sample of size 36 has

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Suppose x has a mound-shaped distribution with σ = 9. A random sample of size 36 has sample mean 20.
(a) Is it appropriate to use a normal distribution to compute a confidence interval for the population mean μ? Explain.
(b) Find a 95% confidence interval for μ.
(c) Explain the meaning of the confidence interval you computed.
Distribution
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Understanding Basic Statistics

ISBN: 9781111827021

6th Edition

Authors: Charles Henry Brase, Corrinne Pellillo Brase

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