Table 3.
Statistical result of a repeated measure1 ANOVA with breed and time as factors.
| Effect | SS2 | df | MS | F | P |
|---|---|---|---|---|---|
| Between group | |||||
| Breed | 1,762.4 | 3 | 587.5 | 119.3 | <0.0001 |
| Error | 2,344.8 | 476 | 4.9 | ||
| Within group | |||||
| Time | 2,488.7 | 3 | 829.6 | 295.4 | <0.0001 |
| Time×breed | 114.1 | 9 | 12.7 | 4.5 | <0.0001 |
| Error (time) | 4,010.7 | 1,428 | 2.8 | ||
1NAb levels were measured on the same chickens of each breed at Weeks 20, 25, 35, and 45. Between-groups comparison showed significant effect of breed on the NAb levels. Within-group comparison showed significant effect of time on NAb levels, and the interaction of time with breeds showed that breed had different effect on NAb levels depending on time at (P < 0.0001).
2SS = sum of squares; MS = mean square; F = mean F-value.