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    Question

    If the regression coefficients of x on y and y on x are

    -1/4 and -1/9 respectively, then what is the correlation coefficient between x and y?
    A 1/6 Correct Answer Incorrect Answer
    B 1/36 Correct Answer Incorrect Answer
    C -1/6 Correct Answer Incorrect Answer
    D -1/36 Correct Answer Incorrect Answer
    E 1/4 Correct Answer Incorrect Answer

    Solution

      r= -1/6. (The sign of r depends on the sign of regression coefficients. It takes the sign of the regression coefficients always)

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