A survey of 34 college freshmen found that they average 6.46 hours of sleep each night. A 99% confidence interval had a margin of error of 0.496. a. What are the lower and upper limits of the confidence interval? b. What was the standard deviation, assuming that the population standard deviation is known? a. The lower limit of the confidence interval is and the upper limit of the confidence interval is (Round to three decimal places as needed.)

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A survey of 34 college freshmen found that they average 6.46 hours of sleep each night. A 99% confidence interval had a margin of error of 0.496.
a. What are the lower and upper limits of the confidence interval?
b. What was the standard deviation, assuming that the population standard deviation is known?
Accessit
Purchas
a. The lower limit of the confidence interval is
(Round to three decimal places as needed.)
and the upper limit of the confidence interval is
Commu
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Transcribed Image Text:Library A survey of 34 college freshmen found that they average 6.46 hours of sleep each night. A 99% confidence interval had a margin of error of 0.496. a. What are the lower and upper limits of the confidence interval? b. What was the standard deviation, assuming that the population standard deviation is known? Accessit Purchas a. The lower limit of the confidence interval is (Round to three decimal places as needed.) and the upper limit of the confidence interval is Commu Enter your answer in the edit fields and then click Check Answer. 1 part remaining Clear All Check Answer Type here to search acer F10 F3 F4 F5 F6 F8 %
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