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f Upper X overbar=80​, sigma=11​, and n=69​, construct a 95​% confidence interval estimate of the population​...

f Upper X overbar=80​, sigma=11​, and n=69​, construct a 95​% confidence interval estimate of the population​ mean, mu.

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Answer #1

Refer Standard normal table/Z-table or use excel function "=NORM.S.INV((1-0.025))" to find the critical value of z.

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