\[\begin{array}{|l|c|c|c|c|c|c|} \hline \text{Class Interval} & 0 9 & 10 19 & 20 29

\[\begin{array}{|l|c|c|c|c|c|c|} \hline \text{Class Interval} & 0 9 & 10 19 & 20 29