1. A company claims to have produced a blended gasoline that can improve a car's fuel consumption. They decide to compare their product with the leading gas currently on the market Three different cars were used for the test: a Porsche, a Buick, and a VW. The Porsche got 13,6 mpg with the new gas and 12.2 mpg with the "standard" gas; the Buick got 18.7 mpg with the new gas an 185 with the standard; the figures for the VW were 34.5 and 326, respectively.

2. In a survey conducted by State University's Leaming Center, a sample of three freshmen said they studied 6, 4, and 10 hours, respectively, over the weekend 1be same question was posed to three sophomores, who reported study times of 4, S, and 7 hours. For three juniors. the responses were 2, 8, and 6 hours.