To calculate the average weights of the two rabbit breeds, we sum the weights for each breed and divide by the number of rabbits in each group. For Breed A, the average weight is (10 + 8 + 7 + 10 + 9 + 9 + 10 + 9) / 8 = 9.25 pounds. For Breed B, the average weight is (10 + 12 + 14 + 13 + 10 + 15 + 11 + 12) / 8 = 12.125 pounds.
Several factors could contribute to the differing weights observed between Breed A and Breed B, such as genetic predispositions, dietary differences, environmental factors, and the age of the rabbits. To track and measure the growth rate of the two breeds, I would conduct a longitudinal study in which I weigh each rabbit at regular intervals (e.g., weekly or bi-weekly) over a set period, ensuring consistent feeding and care across the breeds to minimize external variability. This data could then be used to analyze growth patterns and averages across the two groups.