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Unformatted text preview: r : The best answer is (d). 3.106 Describing association between categorical variables: The best answer is (b). 3.107 Slope and correlation: The best answer is (c). 3.108 True-false : a) False. The weakest correlation is between y and x 1. b) True. The slope and the correlation would have the same sign. c) True. The slope tells us that an increase of one year leads to a predicted increase of 0.4 thousands of dollars, which translates into $400. d) True. Ten times the slope equals four. Income is in thousands of dollars and thus, this predicted increase is $4000....
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