In order to estimated the annual cost of full-time employees absences due to child care issues, a large multi-state company is trying to estimate the number of absences full-time employees take per year. Based on earlier studies, they assumed that s= 2.1 days. %3D a) How large a sample must be selected if the company wants to be 90% confident that their estimate is within 1 day of the true mean?

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Author:Amos Gilat
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In order to estimated the annual cost of full-time employees absences due to child care issues,
a large multi-state company is trying to estimate the number of absences full-time employees
take per year. Based on earlier studies, they assumed that s= 2.1 days.
%3D
a) How large a sample must be selected if the company wants to be 90% confident that their
estimate is within 1 day of the true mean?
Transcribed Image Text:In order to estimated the annual cost of full-time employees absences due to child care issues, a large multi-state company is trying to estimate the number of absences full-time employees take per year. Based on earlier studies, they assumed that s= 2.1 days. %3D a) How large a sample must be selected if the company wants to be 90% confident that their estimate is within 1 day of the true mean?
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