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Suppose that a simple random sample is taken from a normal population having a standard deviation of 15 for the purpose of obtaining a 95% confidence interval for the mean of the population. a. If the sample size is 9, obtain the margin of error. b. Repeat part (a) for a sample size of 16. a. The margin of error for a sample size of 9 is □ (Round to two decimal places as needed.)

answer a & b please

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Answer #1

Standard de w ation ー 15 c. I. - con tidence intervalas 295%二 error= 2 9S% Marsin ot error 16 XIS 3 Margin o erro 9X IS

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