In order to determine the average weight of carry-on luggage by passengers in airplanes, a sample of 47 pieces of carry-on luggage was weighed. The average weight was 32 pounds. Assume that we know the standard deviation of the population to be 3 pounds. Also, assume the population is normally distributed. a. b. Determine an 80% confidence interval estimate for the population mean weight of the carry-on luggage. Determine a 95% confidence interval estimate for the population mean weight of the carry-on luggage.

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