For the data in Exercises 3.26 and 3.27,
a. Calculate the coefficient of variation (CV) for both the racers’ ages and their years of experience. Are the two CVs relatively the same? Compare their relative sizes to the relative sizes of their standard deviations.
b. Estimate the standard deviations for both the racers’ ages and their years of experience by dividing the ranges by 4. How close are these estimates to the standard deviations calculated in Exercises 3.26 and 3.27?