As part of the Berkeley Guidance Study the heights (in cm) and weights (in kg) of 13 girls were measured at age 2 and again at age 9. Of course, the average height and weight were much greater at age 9 than at age 2. Likewise, the SDs of height and of weight were much greater at age 9 than they were at age 2. But what about the coefficient of variation, which gives the SD as a percentage of the mean? It turns out that the coefficient of variation amount from age 2 to age 9. but for the other variable, the increase in the coefficient of variation was fairly large. For which variable, height or weight, would you expect the coefficient of variation to change more between age 2 and age 9? Why?