A camp director is interested in the mean number of letters each child sends during his or her camp session. The population standard deviation is known to be 2.5. A survey of 20 campers is taken. The mean from the sample is 7.9. Find the 99% confidence interval for the mean number of letters.
Computing Confidence In the following exercises, you will compute confidence intervals using Excel. You will submit a single Excel file that includes your results for all of the exercises. For each exercise, include the output from Toolpak (or whatever tool you are using), and make sure that you clearly show the following: Confidence level Whether […]