Homework: HW CH17 Question 1, 17.1.31-T HW Score: 64.29%, 4.5 of 7 points Part 1 of 3 Points: 0.5 of 1 Save The accompanying data indicate the prices of 155 used luxury cars. Some have four-wheel drive (the model identified by the Xi type), and others two-wheel drive (the model denoted simply by the letter i). Complete parts (a) and (b). Click the icon to view the data table. (a) If the data are treated as samples of the typical selling prices of these models, what can be concluded? Do four-wheel drive models command a higher price as used cars, or are differences in average price between these samples typical of sampling variation? Use a = 0.05. Let u, be the population mean price of a used four-wheel drive luxury car and let 2 be the population mean price of a used two-wheel drive luxury car. The 95% confidence interval for H, - H2 is $ to $. (Round to the nearest cent as needed.)