You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 74.4 73.6 64.9 63.4 50.6 62.9 68.4 72.8 71.7 49.1 Find the 90% confidence interval. Enter your...

Extracted text: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 74.4 73.6 64.9 63.4 50.6 62.9 68.4 72.8 71.7 49.1 Find the 90% 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). 90% C.I. = Answer should be obtained without any preliminary rounding.