SOB 324 [Threshold]
Use the stem and leaf diagram to find the interquartile range of the data. There are 26 values.
\[\begin{array}{c|cc}
0 & 5\\
1 & 0&4&7&8\\
2 & 0\\
3 & 1&6\\
4 & 1&3&3&8\\
5 & 2&2&9\\
6 & 0&2&7&9\\
7 & 5&5&6&7\\
8 & 5&6&7\\
\end{array}\]
\[\text{Lower quartile} = 32.25\\
\text{Upper quartile} = 73.5\\
\text{Interquartile range} = 41.25\]