Question

QUESTION 2 (6 points) To determine whether there is a difference in the age, on averagc, that adolescent boys and girls begin to smoke, samples of 18 boys and 13 girls who smoke were selected The sample of boys yielded a mcan age of 11.3 years and a standard deviation of 4 years, while the sample of girls had a mean age of 12.6 years with a standard deviation of 3.5 years. Assume that these two samples come from normal populations. a Determine and conduct the appropriate test ofhypothesis at α:005 b. What is the estimate for the variance of the populations in this example? QUESTION3 (6 points) A large convention is scheduled in Halifax. The convention's board of directors rented space in 5 local hotels, which thcy call A, B C, D and E. It was assumed that of those attending the convention, 15% will want hotel A, 20% will want hotel B, 35% will want hotel C, 20% will want hotel D, and 10% will want hotel E In order to test this assumption a random sample of200 conventioneers s contacted. Each individual indicates hisher desired hotel. A B C DE Hotel # ofindividuals desired given hotel 31 64 72 28 5 Test at α-0.01 if the assumptions of the directors are correct.

Answer 1

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