SOLUTION: Salaries of 43 college graduates who took a statistics course in college have a​ mean, x of $ 61,200. Assuming a standard​ deviation, sigma​, of ​$18,215
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Question 1131775: Salaries of 43 college graduates who took a statistics course in college have a mean, x of $ 61,200. Assuming a standard deviation, sigma, of $18,215, construct a 90% confidence interval for estimating the population mean mu.
Please help! Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! the half-interval width is z*sigma/sqrt(n)
z for 90% CI is 1.645
sigma is 18,215, and n is 43
half-interval is 4569.4, use 4569
interval is 61200+/-4569
($56631, $65769)
