If ∑(X−¯¯¯¯¯X)(Y−¯¯¯¯Y) = 90, ∑(X−¯¯¯¯¯X)2 = 1 – InterviewSolution

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1.	If ∑(X−¯¯¯¯¯X)(Y−¯¯¯¯Y) = 90, ∑(X−¯¯¯¯¯X)2 = 144, ∑(Y−¯¯¯¯Y)2 = 250 and N= 50, what is Karl Pearson's correlation coefficient?
Answer» If $\sum (X - ¯ ¯¯¯ ¯ X) (Y - ¯ ¯¯ ¯ Y)$ = 90, $\sum (X - ¯ ¯¯¯ ¯ X)^{2}$ = 144, $\sum (Y - ¯ ¯¯ ¯ Y)^{2}$ = 250 and N= 50, what is Karl Pearson's correlation coefficient?

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