Assume that a sample is used to estimate the life expectancy for males in a certain county. Find the 9% confidence interval for a sample of size 43 with a mean of 79.7 years and a standard deviation of 18.8 years. Enter your answer as an open-interval (i. e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 99% C.I. = Answer should be obtained without any preliminary rounding. > Next