A manufacturer of industrial chemicals investigates the effect on its sales of promotion activities $($primarily direct contact and trade shows$),$ direct development expenditures, and short range research. Data are collected for $24$ quartes $(6$ years$)$ and analyzed as below $($in $$100,000$ per quarter$).$ Please see Figure $1.$

$($a$)$ Locate the F statistic.

$($b$)$ Can the hypothesis of no overall predictive value be rejected at $=0\mathrm{.}05?$

$1$

$\backslash$table$[[$Source $|,$SS$,$df$,$MS$,,$Number of obs,$=$