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A school social worker wishes to estimate the mean amount of time each week that high school students spend with friends. She obtains a random sample of 1,242 high school students and finds that the mean weekly time spent with friends is 9.7 hours. The population standard deviation amount of time spent with friends is 7.8 hours. What is the margin of error for a 90% confidence interval for the true mean hours students spend with friends? (Round your answer to three decimal places.)

A school social worker wishes to estimate the mean amount of time each week that high school students spend with friends. She obtains a random sample of 1,242 high school students and finds that the mean weekly time spent with friends is 9.7 hours. The population standard deviation amount of time spent with friends is 7.8 hours. What is the margin of error for a 90% confidence interval for the true mean hours students spend with friends? (Round your answer to three decimal places.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
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A school social worker wishes to estimate the mean amount of time each week that high school students spend with friends. She obtains a random sample of 1,242 high school students and finds that the mean weekly time spent with friends is 9.7 hours. The population standard deviation amount of time spent with friends is 7.8 hours. What is the margin of error for a 90% confidence interval for the true mean hours students spend with friends? (Round your answer to three decimal places.)
Transcribed Image Text:A school social worker wishes to estimate the mean amount of time each week that high school students spend with friends. She obtains a random sample of 1,242 high school students and finds that the mean weekly time spent with friends is 9.7 hours. The population standard deviation amount of time spent with friends is 7.8 hours. What is the margin of error for a 90% confidence interval for the true mean hours students spend with friends? (Round your answer to three decimal places.)
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