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PART 1 : LINEAR CORRELATION — Statistics STD 12 Commerce — Question

Gujarat BoardEnglish MediumSTD 12 CommerceStatisticsPART 1 : LINEAR CORRELATION2 Marks
Question
Find the correlation coefficient from the following data for $15$ observations of two random variables $X$ and $Y . \quad \Sigma(x-\bar{x})(y-\bar{y})=-60, \quad \Sigma(x-\bar{x})^2=100$ and $\Sigma(y-\bar{y})^2=64$
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Answer

$r=-0.75$

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