A random sample of 100 observations from a normally distributed population possesses a mean equal to 76.7

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A random sample of 100 observations from a normally distributed population possesses a mean equal to 76.7 and a standard deviation equal to 7.9. LO6

a. Find a 90% confidence interval for m.

b. What do you mean when you say that a confidence coefficient is .90?

c. Find a 95% confidence interval for m.

d. What happens to the width of a confidence interval as the value of the confidence coefficient is increased while the sample size is held fixed?

e. Would your confidence intervals of parts a and c be valid if the distribution of the original population were not normal? Explain.

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Statistics

ISBN: 9781292161556

13th Global Edition

Authors: James T. McClave And Terry T Sincich

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Question Posted: Jul 19, 2024 07:04 PM

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A random sample of 100 observations from a normally distributed population possesses a mean equal to 76.7

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Statistics

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