Question

1. Tar in cigarettes: Listed below are amounts of tar (mg per cigarette) in sing size cigarettes. 100-mm menthol cigarettes, and 100-mm non menthol cigarettes. The king size cigarettes are nonfiltered, nonmenthol, and nonlight. The 100-mm menthol cigarettes are filtered and nonlight. The 100-mm nonmenthol cigarettes are filtered and nonlight. Use a .05 significance level to test the claim that the three categories of cigarettes yield the same mean amount of tar. Given that only the king-size cigarettes are not filtered, do the filters appear to make a difference?

King 20,27,27,20,20,24,20,23,20,22,20,20,20

        20, 20,10, 24, 20, 21, 25, 23, 20,22,20,20

Kool 16,13,16,9,14,13,12,14,14,13,13,16,13,

         13, 18, 9, 19, 2, 13, 14, 14, 15,16 6, 8,

Long 5, 16, 17, 13, 13, 14, 15, 15, 15, 9, 13, 13,13,

        15, 2, 15, 15, 13, 14, 15, 16, 15, 7, 17, 15,

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Answer 1