Question

Each year a market research company surveys new car owners 90 days after they purchase their cars. This data is used to rate auto brands (such as Toyota and Ford) on quality and customer satisfaction. Suppose the following were the quality rating and satisfaction scores for all 33 brands sold in the United States.

Brand	Quality Rating	Satisfaction 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
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	837
Mercury	113	769
Mini Cooper	133	815
Mitsubishi	146	767
Nissan	111	763
Porsche	83	882
Ram	110	780
Scion	114	764
Subaru	121	755
Suzuki	122	750
Toyota	117	740
Volkswagen	135	797
Volvo	109	795

Compute the value of the correlation coefficient. (Round your answer to three decimal places.)

r =

Answer 1

The statistical software output for this problem is :

r = -0.238