Assume that a sample is used to estimate a population mean μμ. Find the 99.9% confidence interval for a sample of size 73 with a mean of 46.9 and a standard deviation of 13.4. Enter your answer as an...

Assume that a sample is used to estimate a population mean μμ. Find the 99.9% confidence interval for a sample of size 73 with a mean of 46.9 and a standard deviation of 13.4. Enter your answer as anopen-interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).


99.9% C.I. =


Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.