Construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed. c= 0.99, x= 12.3, s=0.67, n= 18 ..... (Round to one...

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Extracted text: Construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed. c= 0.99, x= 12.3, s=0.67, n= 18 ..... (Round to one decimal place as needed.)