Question: please help solve Assume that a sample is used to estimate a population mean ,u. Find the 80% confidence interval for a sample of size

please help solve

Assume that a sample is used to estimate a population mean ,u. Find the 80% confidence interval for a sample of size 68 with a mean of 76.2 and a standard deviation of 13.7. Enter your answer as an open- interval (i.e., parentheses) accurate to 3 decimal places. The answer should be obtained without any preliminary rounding

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