| Boxplot statistics | |||||
| Variable | lower whisker | lower hinge | median | upper hinge | upper whisker |
| Smokers | 1 | 3 | 4 | 5 | 7 |
| Nonsmokers | 1 | 4 | 6 | 8 | 11 |
| Boxplot Notches | |||
| Variable | lower bound | median | upper bound |
| Smokers | 3.5 | 4 | 4.5 |
| Nonsmokers | 5.001 | 6 | 6.999 |
| Boxplot Means | |||
| Variable | trimmed mean | unbiased SD | |
| Smokers | 3.975 | 1.544 | |
| Nonsmokers | 5.875 | 2.672 | |
