1a) Work Time Lost due to AccidentsAt a large company, the Director of Research found that the average work time lost by employees due to accidents was95hours peryear.She used a random sample of20 employees.The standard deviation of the sample was5.4 hours.Estimate the population mean for the number of hours lost due to accidents for the company, using a99 % confidenceinterval.Assume the variable is normallydistributed.Round intermediate answers to at least three decimalplaces.Round your final answers to the nearest wholenumber.

_____ < < _____

1b) Social Networking SitesA recent survey of8social networking sites has a mean of13.19 million visitors for a specificmonth.The standard deviation was3.5 million.Find the90 % confidence interval of the truemean.Assume the variable is normallydistributed.Round your answers to at least two decimalplaces.

_____ million < < _____ million