1 The stem-and-leaf diagram shows the heights, in metres to the nearest 0.1 m , of a random sample of trees of species \(A\).
| 5 | | | | | | | |
| 5 | 9 | | | | | | |
| 6 | 1 | 4 | | | | | |
| 6 | 5 | 5 | 9 | | | | |
| 7 | 2 | 3 | 3 | 4 | | | |
| 7 | 5 | 6 | 6 | 6 | 7 | 8 | |
| 8 | 0 | 3 | 4 | | | | |
| 8 | 5 | | | | | | |
| | | | | | | |
| | | | | | | |
means 6.4 m
- Find the median and interquartile range of the heights.
- The heights, in metres to the nearest 0.1 m , of a random sample of trees of species \(B\) are given below.
\(\begin{array} { l l l } 7.6 & 5.2 & 8.5 \end{array}\)
5.2
6.3
6.3
6.8
7.2
6.7
7.3
5.4
7.5
7.4
6.0
6.7
In the answer book, complete the back-to-back stem-and-leaf diagram. - Make two comparisons between the heights of the two species of tree.