Table 4.
Results from the mixture model with environmental covariates. The difference in mass between the two groups is approximately 25 kg. A different ‘random’ year effect was fitted to each group. A ‘statistically significant’ difference between sex was found among large weanlings only. Reported estimates are for standardized variables: for example, a male in the second group is on average 
kg heavier than a female.
| parameter | mean | s.e. | lower bound | upper bound | |
|---|---|---|---|---|---|
 (kg) |
89 | 4 | 82 | 99 | |
| group 1: | sex (kg) | 2 | 4 | −5 | 9 |
| small weanlings | σyear1 (kg) | 4 | 4 | 0 | 11 |
| 1 − p (%) | 29 | 7 | 17 | 40 | |
 (kg) |
115 | 4 | 107 | 124 | |
| group 2: | sex (kg) | 4 | 2 | 1 | 8 |
| large weanlings | σyear2 (kg) | 7 | 4 | 2 | 16 |
| p (%) | 71 | 7 | 60 | 83 |