Suppose that a researcher collected a sample of size 15 from a normal population and produced the following 99% confidence interval for the population mean , with the population standard deviation known: (24.83, 33.97). Find a 95% confidence interval for based on the same sample. The answer is of the form (a,b). What is the value of b? (A) 31.74 (B) 34.02 (C) 31.17 (D) 32.31 (E) 32.88 (F) 30.60 (G) 30.03 (H) 33.45