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4 Jul 2021
3. [2.62/4.76 Points]
How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from } 20
F 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.
(a) Use a calculator with mean and sample standard deviation keys to find the sample mean price 
and sample standard deviation s. (Round your answers to four decimal places.)
= $ _____
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 $ _______
3. [2.62/4.76 Points]
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 ($) for sleeping bags in this temperature range is given below. Assume that the population of x values has an approximately normal distribution.
F to 45F. A random sample of prices ($) for sleeping bags in this temperature range is given below. Assume that the population of x values has an approximately normal distribution. (a) Use a calculator with mean and sample standard deviation keys to find the sample mean price and sample standard deviation s. (Round your answers to four decimal places.)
and sample standard deviation s. (Round your answers to four decimal places.) = $ _____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.)
of all summer sleeping bags. (Round your answers to two decimal places.)lower limit $ _______
upper limit $ _______
4 Aug 2021
5 Jul 2021
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