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In calculating the coefficient of correlation between two variables \( x \) and \( y \) for 12 pairs of observations, the following data was obtained :
\[
\Sigma x=30, \Sigma y=5, \Sigma x^{2}=670, \Sigma y^{2}=285, \Sigma x y=334 \text {. }
\]
On rechecking, it was found that one pair \( (11,4) \) was wrongly copied while the correct pair being \( (10,14) \). Find the correct value of coefficient of correlation.
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