-Assume that a sample is used to estimate a population mean μ . Find the 99.9% confidence interval for a sample of size 72 with a mean of 70.7 and a standard deviation of 14.1. Enter your answer as an open interval accurate to one decimal place (because the sample statistics are reported accurate to one decimal place)
Added by Billy W.
Step 1
We need to find the standard error of the mean (SEM) using the formula: SEM = standard deviation / square root of sample size SEM = 14.1 / sqrt(72) = 1.66 Show more…
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