Find Karl Pearson's coefficient of correlation between \( X \) and ...

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Find Karl Pearson's coefficient of correlation between \( X \) and \( Y \) for the following data:
\begin{tabular}{|c|c|c|c|c|c|c|c|c|}
\hline \( \mathrm{X} \) & 16 & 18 & 21 & 20 & 22 & 26 & 27 & 15 \\
\hline \( \mathrm{Y} \) & 22 & 25 & 24 & 26 & 25 & 30 & 33 & 14 \\
\hline
\end{tabular}
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