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Construct the confidence interval for the population mean u. c- 0.95, x - 15.5, 6 -8.0, and n=40 A 85% confidence interval for u is

Construct the confidence interval for the population mean u. c- 0.95, x - 15.5, 6 -8.0, and n=40 A 85% confidence interval for u is (Round to one decimal place as needed.)

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