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Question: the mean and standard deviation of a random sample of...

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The mean and standard deviation of a random sample of n measurements are equal to 33.1 and 3 9, respectively a Find a 90% confidence interval for μ if n-144 b Find a 90% confidence interval for μ if n-576 c. Find the widths of the confidence intervals tound in parts a and b What is the effect on the width of a confidence interval of quadrupling the a The 90% confidence interval for μ it n = 144 is approximately (Round to three decimal places as needed) CLD
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