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
