You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 48.8 45 40.6 33.5 52.3 33.2 40 49.1 31 28.6 Find the 80% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place). 80% C.I. = Answer should be obtained without any preliminary rounding