| Boxplot statistics | |||||
| Variable | lower whisker | lower hinge | median | upper hinge | upper whisker |
| Smokers | 2 | 3 | 4 | 5 | 7 |
| Non-Smokers | 5 | 7 | 8 | 9 | 11 |
| Boxplot Notches | |||
| Variable | lower bound | median | upper bound |
| Smokers | 3.293 | 4 | 4.707 |
| Non-Smokers | 7.293 | 8 | 8.707 |
| Boxplot Means | |||
| Variable | trimmed mean | unbiased SD | |
| Smokers | 4.15 | 1.461 | |
| Non-Smokers | 8.1 | 1.553 | |
