12.28 Do SUVs waste gas? Table 11.2 (page 261) gives the highway fuel consumption (in miles per gallon) for 31 model year 2015 mid-sized cars. You found the five-number summary for these data in Exercise 12.14. Here are the highway gas mileages for 26 four-wheel-drive model year 2015 sport utility vehicles:
(a) Give a graphical and numerical description of highway fuel consumption for SUVs. What are the main features of the distribution?
(b) Make boxplots to compare the highway fuel consumption of the mid-size cars in Table 11.2 and SUVs. What are the most important differences between the two distributions?