| | Mod(Coef) | Mod(4) |
---|
| | All animals1 | Selected females2 | All animals1 | Selected females2 |
---|
Mean EBV (std) | Data1 Data2 | 8.4 (9.4) 8.5 (9.9) | 9.4 (9.0) 8.4 (9.5) | 6.3 (7.1) 6.2 (7.3) | 6.5 (5.5) 6.6 (6.6) |
Wilcoxon rank-sum test3 | Data1 Data2 | 0.23 0.29 | 0.27 0.36 |
test4 | | 0.84 | 0.82 |
- 1756 females having records in 2005 and 2006; 243 females having twin lambs for the first time in 2006 after having reared single lambs at least twice; 3p value of the wilcoxon rank-sum test to test if the distributions of rank of all versus selected females are different; 4p value of the chi-square test to test if the percentages of selected females in each quartile of the EBV distribution are different in 2005 and 2006; Data1: all records before 2005; Data2: all records before 2006