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If $S _ {xx } = 2 , S _ { yy } = .5 ,\text {, and } S _ { xy } = - .75$

Question 65

Short Answer

If $S _ {xx } = 2 , S _ { yy } = .5 ,\text {, and } S _ { xy } = - .75$ then the sample correlation coefficient r equals __________.

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