Question
Find coefficient of correlation between $X$ and $Y$ from the following data: $ n=15, \Sigma x=975, \Sigma y=1530, \Sigma(x-65)^{2}=576, \Sigma(y-102)^{2}=1225$
$ \text { and } \sum(x-65)(y-102)=714 $
$ \text { and } \sum(x-65)(y-102)=714 $
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