Construct the confidence interval for the population mean u. c=0.95, x = 7.5, 6 = 0.8, and n = 46 . . . A 95% confidence interval for u is (.). (Round to two decimal places as needed.)Construct the confidence interval for the population mean u. c= 0.95, x = 7.5, o = 0.8, and n = 46 . .. A 95% confidence interval for u is ( , . (Round to two decimal places as needed.)