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  3. you are given a sample mean and the population sta

you are given a sample mean and the population standard deviation. use the information to construct...

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Statistics

you are given a sample mean and the populationstandard deviation. use the information to construct the 90% and95% confidence intervals for the population mean. interpret theresults and compare the widths of the confidence intervals. from arandom sample of 34 days. mean closing price of a certain stock was121.96. standard deviation is 10.74.

Answer & Explanation Solved by verified expert
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Solution The 90 confidence interval for population mean is given asfollows Where x is sample mean is population standard deviation nis sample size and Z0102 is critical zvalue to construct 90confidence intervalWe havex 12196 1074 and n 34Using    See Answer
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