How much does a sleeping bag cost? let's say you want a sleeping bag that should keep you warm in temperatures from 20 degrees f to 45 degrees . a random sample of prices for sleeping bags in this temperature range was taken from backpacker magazine: gear guide (vol.25 issue 157, no 2) brand names include american camper, cabela's camp 7, caribou, cascade, and coleman 80,90,100,120,75,37,30,23,100,110 105,95,105,60,110,120,95,90,60,70 a) use a calculator with mean and sample standard deviation keys to verify that sample mean is around $83.75 and s is around $28.97 b) using the given data as representative of the population of prices of all summer sleeping bags, find a 90% confidence interval for the mean price μ of all summer sleeping bags. c) what does the confidence interval mean in the context of this problem?