3.38 The accompanying table gives data from a survey of new car owners conducted by J.D. Power and Associates (USA Today, June 16 and July 17, 2010). For each brand of car sold in the United States, data on a quality rating (defects per 100 cars, so lower numbers indicate higher quality) and a customer satisfaction rating (called the APEAL rating) are given in the accompanying table. The APEAL rating is a score between 0 and 1000, with higher values indicating greater satisfaction.

Brand Quality Rating APEAL Rating Acura 86 822 Audi 111 832 BMW 113 845 Buick 114 802 Cadillac 111 818 Chevrolet 111 789 Chrysler 122 748 Dodge 130 751 Brand Quality Rating APEAL Rating Ford 93 794 GMC 126 792 Honda 95 766 Hyundai 102 760 Infiniti 107 805 Jaguar 130 854 Jeep 129 727 Kia 126 761 Land Rover 170 836 Lexus 88 822 Lincoln 106 820 Mazda 114 774 Mercedes-Benz 87 842 Mercury 113 769 Mini Cooper 133 815 Mitsubishi 146 767 Nissan 111 763 Porsche 83 877 Ram 110 780 Scion 114 764 Subaru 121 755 Suzuki 122 750 Toyota 117 745 Volkswagen 135 797 Volvo 109 795

a. Construct a scatterplot of x 5 quality rating and y 5 APEAL rating. (Hint: See Example 3.21.)

b. Does customer satisfaction (as measured by the APEAL rating) appear to be related to car quality?