Question: Let 7' be the correlation coeicient. Denote the explanatory variable by X and the responsible variable by Y. Which statement is correct ? (A) Positive

Let 7' be the correlation coeicient. Denote the explanatory variable by X and the responsible variable by Y. Which statement is correct ? (A) Positive 7' indicates a perfect linear relationship between X and Y. (B) "r is always a number between 0 and 1. (C) 'r is almost 0 if values of X 's and Y's are all positive. (D) The correlation of variables X and Y is r. (E) None of the above

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