Find the mean, variance and standard deviation for the following frequency distribution: \begin{...

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Find the mean, variance and standard deviation for the following frequency distribution:
\begin{tabular}{|l|c|c|c|c|c|}
\hline Classes & \( 0-10 \) & \( 10-20 \) & \( 20-30 \) & \( 30-40 \) & \( 40-50 \) \\
\hline Frequency & 5 & 8 & 15 & 16 & 6 \\
\hline
\end{tabular}
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