$\hat{y}$ = + $x_1$ + $x_2$ + $x_3$ + $x_4$  
$x_1$ =   $x_2$ =   $x_3$ =   $x_4$ =
$n$ =   SST =   SSR =
MSR =   MSE =
$s_{b_1}$ =   $s_{b_2}$ =   $s_{b_3}$ =   $s_{b_4}$ =
Example 1Example 2
Example 1Example 2