30) The following display from a TI-84 Plus calculator presents a 95% confidence interval. TInterval (52.45, 54.30) x =53.375 Sx = 3.68 n = 65 Fill in the blanks: We are confident that the population mean is between and A) 5%, 52.45, 54.30 B) 5%, 0, 53.375 30) C) 95%, 52.45, 54.30 D) 95%, 0, 53.375 31) Find a2 when "=25 for the 95% confidence interval for the mean. 31) A) 2.63 B) 1.30 C) 1.71 D) 2.06 32) A sample of size "= # has a sample mean x= 11.9 and sample standard deviation S-. Construct a 99% confidence interval for the population mean u. 32) A) 11.2