Find the mean deviation about the median for the following data :
\begin{tabular}{|c|c|c|c|c|c|}...
Find the mean deviation about the median for the following data :
\begin{tabular}{|c|c|c|c|c|c|}
\hline\( x_{i} \) & 15 & 21 & 27 & 30 & 35 \\
\hline\( f_{i} \) & 3 & 5 & 6 & 7 & 8 \\
\hline
\end{tabular}
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