In looking at our class’s data as a sample of a larger population of students (who...

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In looking at our class’s data as a sample of a largerpopulation of students (who have taken, are taking, or may oneday take this class), we find that the mean number of hoursexercised per week during the summer is nearly 9 hours. We knowthat this is an estimate however. Is it likely that the truepopulation mean is actually under 7 hours? Use a 95% confidenceinterval to determine this. If we’re willing to use a 99%confidence interval, does that change our findings? (Careful withyour rounding!)
. mean exersum
Meanestimation                  Number of obs  =        215
--------------------------------------------------------------
            |       Mean   Std.Err.     [95% Conf. Interval]
-------------+------------------------------------------------
     exersum |  8.946512   .7143183

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Solution First of all we have to find 95 confidence interval for population mean Confidence interval Xbar ZSE Where SE is standard error We use Z confidence interval because sample size is given as n215 which is larger as compared to n30 For 95 See Answer

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