You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 62.6 52.8 54.4 57.5 45.6 52.1 51.8 63.5 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.

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