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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

      ┬а 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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