Find the mean deviation about the mean for the following data :
\begin{tabular}{|l|c|c|c|c|c|}
\... VIDEO
Find the mean deviation about the mean for the following data :
\begin{tabular}{|l|c|c|c|c|c|}
\hline Size & 20 & 21 & 22 & 23 & 24 \\
\hline Frequency & 6 & 4 & 5 & 1 & 4 \\
\hline
\end{tabular}
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