答：该研究采用随机区组设计，残差图内的点都在±2范围内，提示该数据基本

Answer: The study adopts a random block design, and the points in the residual graph are all within ±2, indicating that the data basically meets the conditions of homogeneity of variance and normality. The analysis of variance of random block design can be performed. <br>The results showed that P0.05 between different pig breeds was not statistically significant, and it can be considered that the average level of influence of different feeds on weight gain is the same.

A: The study used random area group design, the points within the residual graph are in the ±2 range, suggesting that the data basically meet the variance and normality conditions. A variance analysis of random group designs can be performed.<br>The results showed that P05 was not statistically significant between different pig breeds, and the average level of weight gain effect of different feeds could be considered to be the same.

A: random block design was used in this study. The points in the residual diagram were within ± 2, which indicated that the data basically met the conditions of homogeneity and normality of variance. Analysis of variance of randomized block design can be carried out.<br>The results showed that there was no significant difference between different pig breeds (P 0.05). It can be considered that the average level of different diets on weight gain was the same.<br>