Using the data given below, construct the cumulative frequency table and draw the ogive. From th...

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Using the data given below, construct the cumulative frequency table and draw the ogive. From the ogive determine:
the interquartile range.
\begin{tabular}{|l|c|c|c|c|c|c|c|c|}
\hline Marks & \( 0-10 \) & \( 10-20 \) & \( 20-30 \) & \( 30-40 \) & \( 40-50 \) & \( 50-60 \) & \( 60-70 \) & \( 70-80 \) \\
\hline Frequency & 3 & 8 & 12 & 14 & 10 & 6 & 5 & 2 \\
\hline
\end{tabular}
Also state the median class.
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