Table 3. Descriptive statistics of county level estimates of tractor overturn rates, tractor characteristics, and physiographic characteristics in Kentucky.
| nā=ā119 counties | ||||
| Mean (SD) | Median | Q1 - 25% | Q3 - 75% | |
| Dependent variable | ||||
| Tractor overturns per 100,000 tractors | 8.5 (6.4) | 7.4 | 4.1 | 11.7 |
| Independent variables | ||||
| Average percent slope of pasture land by county | 5.3 (2.3) | 5.0 | 4.0 | 6.0 |
| Percent of total tractors with <40 horsepower by county | 32.9 (9.7) | 34.3 | 30.0 | 37.8 |
| Percent of total tractors with ā„100 horsepower by county | 10.1 (8.5) | 7.8 | 5.1 | 11.0 |
| Percent crop and pasture land by county | 33.6 (20.3) | 33.7 | 14.3 | 51.1 |
| Stream miles per square mile of crop and pasture land by county | 2.2 (1.9) | 1.5 | 1.0 | 2.3 |
| Median size of farms in acres by county | 81.1 (21.7) | 80.0 | 63.0 | 99.0 |