Find a confidence interval for μ assuming that each sample is from a normal population. (round the value of t to 3 decimal places and your final answers to 2 decimal places.) (a) 1formula63. mml = 21, s = 4, n = 5, 90 percent confidence. the 90% confidence interval is 23.94 to 23.94 (b) 1formula63. mml = 41, s = 8, n = 16, 99 percent confidence. the 99% confidence interval is to (c) 1formula63. mml = 115, s = 11, n = 26, 95 percent confidence. the 95% confidence interval is to