You intend to estimate a population mean / with the following sample. 10.8 7.9 36.3 12.5 3.4 12.4 21.3 11 -4.3 You believe the population is normally distributed. Find the 95% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to twp decimal places (because the sample data are reported accurate to one decimal place). 95% C.I. =