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Salaries of 45 college graduates who took a statistics course in college have a mean, x...

Salaries of 45 college graduates who took a statistics course in college have a mean, x overbar , of $ 65 comma 900 . Assuming a standard deviation, sigma , of $12 comma 992 , construct a 95 % confidence interval for estimating the population mean u .

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Answer #1

Z for 95% confidence interval = Z0.025 = 1.96

confidence interval

                              

                              

                               = (62104 , 69696)

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