Answer
$R^2=0.7584=75.84$%
75.84% of the variation of the head circumference is explained by the model found in part (e).
$R^2_{adj}=0.7383=73.83$%
It adjusts the value of $R^2$, given the size of the sample, $n$, and the number of explanatory variables, $k$.
Work Step by Step
See the results in MINITAB, part (e).
$R^2=0.7584=75.84$%
$R^2_{adj}=1-(\frac{n-1}{n-k-1})(1-R^2)=1-(\frac{14-1}{14-1-1})(1-0.7584)=0.7383$
