Answer
$x ̅=22.150~years$
$E=0.059~years$
Work Step by Step
The point estimate of the population mean is the sample mean.
The margin of error, $E$, is the difference between the upper bound and the point estimate (or between the point estimate and the lower bound):
$E=22.209-22.150=22.150-22.091=0.059$
