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A survey of 33 college freshmen found that they average 6.63 hours of sleep each night. A 90% confidence interval had a margin of error of 0.497. 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 (Round to three decimal places as needed.) and the upper limit of the confidence interval is.

A survey of 33 college freshmen found that they average 6.63 hours of sleep each night. A 90% confidence interval had a margin of error of 0.497. 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 (Round to three decimal places as needed.) and the upper limit of the confidence interval is.

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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A survey of 33 college freshmen found that they average 6.63 hours of sleep each night. A 90% confidence interval had a margin of error of 0.497. 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? 3320 201 Ristrariis! Tersey Tranto ele Con TERZS SABALST 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.) S 20 136 Sierad THE SENSO Hengere ANICURAT call THE FIRST T PH secon delay THE POO Le rasketdas HUDWIKTSE SURCH BENGUE kin Om Hallla AS Triseny ute in VETOVATILE nin ne tok pal TEREORGHINKIN LEMPANon= LAINAN HOTAR ESTA N WHAN ORS DDY
Transcribed Image Text:A survey of 33 college freshmen found that they average 6.63 hours of sleep each night. A 90% confidence interval had a margin of error of 0.497. 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? 3320 201 Ristrariis! Tersey Tranto ele Con TERZS SABALST 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.) S 20 136 Sierad THE SENSO Hengere ANICURAT call THE FIRST T PH secon delay THE POO Le rasketdas HUDWIKTSE SURCH BENGUE kin Om Hallla AS Triseny ute in VETOVATILE nin ne tok pal TEREORGHINKIN LEMPANon= LAINAN HOTAR ESTA N WHAN ORS DDY
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