In a study for determining the effect of weaning conditions on the weight of 9-week-old pigs, data on weaning (WWT) and 9-week (FWT) weights were recorded for pigs from three litters. One of these...

In a study for determining the effect of weaning conditions on the weight of 9-week-old pigs, data on weaning (WWT) and 9-week (FWT) weights were recorded for pigs from three litters. One of these litters was weaned at approximately 21 days (EARLY), the second at about 28 days (MEDIUM), and the third at about 35 days (LATE). The data are given in Table 11.17. Perform an analysis of covariance using FWT as the response, weaning time as the factor, and WWT as the covariate. Comment on the results. Is there a problem with assumptions?