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You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:
89.5
89.5
92.2
80.4
84.6
70.4
13.1
86.2
63.6


Find the 99% 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).

99% C.I. =


Answer should be obtained without any preliminary rounding.


Sagot :