A teacher asked 21 pupils to estimate the height of a building in metres. The stem-and-leaf diagram shows all 21 results.
6
6
9
| 5
5
5 represents 6.5m
7
0
2
6
8
8
8
3
3
5
7
7
9
9
0
5
5
5.
10
4
8
11
N
wi
What was the median estimated height?