Use the following sample to estimate a population mean . 56 79.3 86 85.8 80.5 79.9 81.5 81.1 81 96.4 Assuming the population is normally distributed, find the 99.5% confidence interval about the population mean. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places. 99.5% C.1. =

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