#5

How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from20Fto45F.A random sample of prices ($) for sleeping bags in this temperature range is given below. Assume that the population ofxvalues has an approximately normal distribution.1155585401151153023100110105951056011012095906070

(a) Use a calculator with mean and sample standard deviation keys to find the sample mean pricexand sample standard deviations. (Round your answers to two decimal places.)x=$s=$

(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?of all summer sleeping bags. (Round your answers to two decimal places.)

lower limit $

upper limit$

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 ($) for sleeping bags in this temperature range is given below. Assume that the population of X values has an approximately normal distribution. 115 55 85 40 115 115 30 23 100 110 105 95 105 60 110 120 95 90 60 70 (a) Use a calculator with mean and sample standard deviation keys to find the sample mean price )7 and sample standard deviation 5. (Round your answers to two decimal places.) 2=$ 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 $ upper limit $