7.80 Size of trees in the eastern and western halves. Refer to the previous exercise. The Wade Tract can also be divided into eastern and western halves. Here are the DBHs of 30 randomly selected longleaf pine trees from each half:
| 23.5 | 43.5 | 6.6 | 11.5 | 17.2 | 38.7 | 2.3 | 31.5 | 10.5 | 23.7 | |
| East | 13.8 | 5.2 | 31.5 | 22.1 | 6.7 | 2.6 | 6.3 | 51.1 | 5.4 | 9.0 |
| 43.0 | 8.7 | 22.8 | 2.9 | 22.3 | 43.8 | 48.1 | 46.5 | 39.8 | 10.9 | |
| 17.2 | 44.6 | 44.1 | 35.5 | 51.0 | 21.6 | 44.1 | 11.2 | 36.0 | 42.1 | |
| West | 3.2 | 25.5 | 36.5 | 39.0 | 25.9 | 20.8 | 3.2 | 57.7 | 43.3 | 58.0 |
| 21.7 | 35.6 | 30.9 | 40.6 | 30.7 | 35.6 | 18.2 | 2.9 | 20.4 | 11.4 |
Using the questions in the previous exercise, analyze these data.