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Assume that a sample is used to estimate a population mean . Find the 99.9% confidence interval for a sample of size 57 with a
Assume that a sample is used to estimate a population mean . Find the 99.9% confidence interval for a sample of size 57 with a mean of 29.9 and a standard deviation of 16.9. Enter your answer as an open-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.
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