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    Correlation b/w hours spent studying and points earned

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    Select the most likely answer for the coefficient of linear correlation for the following two variables: x = the number of hours spent studying for a test, and y = the number of points earned on the test.

    A. r = 1.20

    B. r = 0.70

    C. r = -0.85

    D. r = 0.05

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    Solution Preview


    B. r= 0.70

    r cannot be larger than 1 so choice A (i.e., r = 1.20) is eliminated.
    Also you would ...

    Solution Summary

    The most likely answer is explained with comments on why the other answers are unlikely.