Question 3.23: Sales of Automobiles The mean of the number of sales of cars......

The coefficients of variation are

\begin{aligned}& \text { CVar }=\frac{s}{\bar{X}} \cdot 100=\frac{5}{87} \cdot 100 \approx 5.7 \% \quad \text { sales } \\& \text { CVar }=\frac{773}{5225} \cdot 100 \approx 14.8 \% \quad \text { commissions }\end{aligned}

Since the coefficient of variation is larger for commissions, the commissions are more variable than the sales.