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    Question

    The Pearson's correlation coefficient between following observation

    X:            1              2              3              4

    Y:            3              4              2              1

    is - 0.8. If each observation of X is halved and of Y is doubled, then Pearson's correlation coefficient equals to

    A -0.81 Correct Answer Incorrect Answer
    B -0.79 Correct Answer Incorrect Answer
    C -0.80 Correct Answer Incorrect Answer
    D -0.82 Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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