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Assume that a sample is used to estimate a population mean /4. Find the 80% confidence interval for a sample of size 45 with a

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Assume that a sample is used to estimate a population mean /4. Find the 80% confidence interval for a sample of size 45 with a mean of 63.3 and a standard deviation of 9.8. Enter your answer as an open- interval (i.e., parentheses) accurate to 3 decimal places. 80% C.I. =

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