Find the mean deviation about the mean for the data
\begin{tabular}{|c|c|c|c|c|c|c|c|c|}
\hline ...
Find the mean deviation about the mean for the data
\begin{tabular}{|c|c|c|c|c|c|c|c|c|}
\hline \( \begin{array}{c}\text { Income per } \\
\text { day in βΉ }\end{array} \) & \( 0-100 \) & \( 100-200 \) & \( 200-300 \) & \( 300-400 \) & \( 400-500 \) & \( 500-600 \) & \( 600-700 \) & \( 700-800 \) \\
\hline \( \begin{array}{c}\text { Number } \\
\text { of persons }\end{array} \) & 4 & 8 & 9 & 10 & 7 & 5 & 4 & 3 \\
\hline
\end{tabular}
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