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 45°F. A random sample of prices ($) for sleeping bags in this temperature...

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 45°F. 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.

95	90	85	115	120	85	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 x and sample standard deviation
s
. (Round your answers to four 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 $____

Jun 06, 2022

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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 45°F. A random sample of prices ($) for sleeping bags in this temperature...

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