Answer
$s_{b_1}=0.05479$
Work Step by Step
$s_e=9.375$ (item (c))
To find $s_x$:
Using the EXCEL, enter the Calories values in the column A.
In A15 enter "=STDEV.S(A1:A14)"
$s_x=47.330$
$s_{b_1}=\frac{s_e}{\sqrt {∑(x_i-x ̅)^2}}=\frac{s_e}{\sqrt {n-1}s_x}$ (see note on page 684)
$s_{b_1}=\frac{9.375}{\sqrt {14-1}\times47.330}=0.05479$
