Calculate Karl Pearson's coefficient of correlation between the mar...

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Calculate Karl Pearson's coefficient of correlation between the marks in English and Mathematics obtained by 10 students :
\begin{tabular}{|l|l|l|l|l|l|l|l|l|l|l|}
\hline English & 20 & 13 & 18 & 21 & 11 & 12 & 17 & 14 & 19 & 15 \\
\hline Mathematics & 17 & 12 & 23 & 25 & 14 & 8 & 19 & 21 & 22 & 19 \\
\hline
\end{tabular}
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