Table 2. Mean MilkBot® parameter statistics for 2 parity groups in 21 randomly selected dairy herds.
Means for all herds of group-mean parameter values and group standard deviation, and divergence score. Divergence score is mean number of matching parity groups (of 20 possible) with which individual groups differ by Z-test at P < .05 (Supplemental Data files are available at: Supplemental Information).
| Metric and parity | Mean group mean | Mean group sd | Mean divergence score |
|---|---|---|---|
| Scale P1 (kg) | 38.66 | 5.87 | 13.9 |
| Scale P2+(kg) | 53.65 | 9.3 | 14.7 |
| Ramp P1 (days) | 31.43 | 2.67 | 10.8 |
| Ramp P2+(days) | 26.13 | 7.66 | 8.8 |
| Offset P1 (days) | −0.5 | 0 | 0 |
| Offset P2+(days) | −0.37 | 0.39 | 4.6 |
| Decay P1 (day−1) | 0.000974 | 0.000605 | 11.3 |
| Decay P2+(day−1) | 0.002213 | 0.000858 | 12.5 |
| RMSE P1 (kg) | 3.73 | 1.51 | 12.5 |
| RMSE P2+(kg) | 4.65 | 2.04 | 11.1 |
| M305 P1 (kg) | 9637 | 1460 | 14.6 |
| M305 P2+(kg) | 11255 | 1811 | 16 |
| PeakDay P1 | 89.83 | 32 | 7.2 |
| PeakDay P2+ | 59.18 | 15.87 | 12.8 |
| PeakMilk P1 (kg) | 33.87 | 6.18 | 13 |
| PeakMilk P2+(kg) | 44.86 | 7.06 | 15.5 |
| Data file P1 | Supplemental Data (file 43.csv) | Supplemental Data (file 44.csv) | Supplemental Data (file 45.csv) |
| Data file P2+ | Supplemental Data (file 46.csv) | Supplemental Data (file 47.csv) | Supplemental Data (file 48.csv) |