| Boxplot statistics | |||||
| Variable | lower whisker | lower hinge | median | upper hinge | upper whisker |
| Smokers | 1 | 3 | 3.5 | 5 | 7 |
| Non-Smokers | 1 | 3 | 4 | 4.5 | 6 |
| Boxplot Notches | |||
| Variable | lower bound | median | upper bound |
| Smokers | 2.793 | 3.5 | 4.207 |
| Non-Smokers | 3.47 | 4 | 4.53 |
| Boxplot Means | |||
| Variable | trimmed mean | unbiased SD | |
| Smokers | 3.8 | 1.642 | |
| Non-Smokers | 3.65 | 1.348 | |
