A simple random sample of size n= 40 is drawn from a population. The sample mean is found to be x= 120.6 and the sample standard deviation is found to be s 13.3 Construct a 99% confidence interval for the population mean.
Added by Angela M.
Step 1
Since the confidence level is 99%, we need to find the critical value that corresponds to a 99% confidence level. We can use a t-distribution since the sample size is less than 30 and the population standard deviation is unknown. Using a t-table with degrees of Show more…
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