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A company is investigating the length of videos posted on two different social media site The summary statistics are shown below: Sample standard Sample Size Mean (second) deviation (second) 73.3 10.8 Social 15 media A Social 12 70.7 12.3 media B Compute the width of the 95% confidence interval of the difference in the time length of the video (width = upper boundary of confidence interval - lower boundary of confidenc interval) (2 d.p.)

A company is investigating the length of videos posted on two different social media site The summary statistics are shown below: Sample standard Sample Size Mean (second) deviation (second) 73.3 10.8 Social 15 media A Social 12 70.7 12.3 media B Compute the width of the 95% confidence interval of the difference in the time length of the video (width = upper boundary of confidence interval - lower boundary of confidenc interval) (2 d.p.)

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 company is investigating the length of videos posted on two different social media sites. The summary statistics are shown below: Sample Size Mean (second) Sample standard deviation (second) 73.3 10.8 Social 15 media A Social 12 70.7 12.3 media B Compute the width of the 95% confidence interval of the difference in the time length of the video (width = upper boundary of confidence interval - lower boundary of confidence interval) (2 d.p.)
Transcribed Image Text:A company is investigating the length of videos posted on two different social media sites. The summary statistics are shown below: Sample Size Mean (second) Sample standard deviation (second) 73.3 10.8 Social 15 media A Social 12 70.7 12.3 media B Compute the width of the 95% confidence interval of the difference in the time length of the video (width = upper boundary of confidence interval - lower boundary of confidence interval) (2 d.p.)
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