Applying the Concepts and Skills Age of Passenger Cars. According to R. L. Polk&Co., the average age of passenger cars in the United States was 9.1 years in 2000. A sample of 37 passenger cars taken this year provided the ages, in years, displayed in the following table. Construct a dotplot for the ages. 10 13 6 9 12 7 7 10 10 12 8 14 6 15 18 7 12 7 6 24 9 19 6 4 12 11 18 9 9 11 19 6 13 15 2 7 11

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