| Min | Median | Max | Mean | Var | SD |
---|
a
1
| 1 | 6 | 16 | 6.17 | 2.33 | 1.53 |
a
2
| 0 | 6 | 50 | 6.83 | 6.31 | 2.51 |
b
1
| 1 | 6 | 16 | 6.19 | 2.33 | 1.53 |
b
2
| 0 | 6 | 90 | 6.97 | 10.46 | 3.23 |
da
| −7 | 0 | 43 | 0.66 | 3.54 | 1.88 |
db
| −7 | 0 | 81 | 0.78 | 7.53 | 2.74 |
dc
| −43 | 0 | 81 | 0.12 | 5.72 | 2.39 |
- Descriptive statistics for the four skin thickness measurements, before (a
1 and b
1), and after (a
2 and b
2) inoculation of the tuberculins, and for the derived traits da = a
2 − a
1, db = b
2 − b
1, and the skin test dc = db − da following quality control