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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