Please answer the following

How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from 20F to 45F. A random sample of prices ($) for sleeping bags in this temperature range is given below. Assume that the population ofx values has an approximately normal distribution. 110 80 120 80 120 80 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 nd the sample mean price )7 and sample standard deviation 5. (Round your answers to two decimal places.) )7 = $ s=$ (b) Using the given data as representative of the population of prices of all summer sleeping bags, nd a 90% condence interval for the mean price p of all summer sleeping bags. (Round your answers to two decimal places.) lower limit 35 upper limit $