You may need to use the appropriate appendix table or technology to answer this question.
In order to determine the average weight of carry-on luggage by passengers in airplanes, a sample of 16 pieces of carry-on luggage was weighed. The average weight was 18 pounds. Assume that we know the standard deviation of the population to be 7 pounds. Also, assume the population is normally distributed. (Round your answers to three decimal places.)
(a) Determine a 97% confidence interval estimate for the population mean weight (in pounds) of the carry-on luggage.
_______ pounds to _______ pounds