If the regression coefficient of x on y and y on x are $$ - {1 \over 2}$$ and $$ - {1 \over 8}$$, respectively then what is the correlation coefficient between x and y?
- A$$ - {1 \over 4}$$
- B$$ - {1 \over 16}$$
- C$$ {1 \over 16}$$
- D$$ {1 \over 4}$$
✓ Correct answer: D
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