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sas模型

用sas软件建立模型如下:The experiment was a completely randomized design with goat as the experimental unit and Zn intake as the treatment. The data were analyzed by one-way ANOVA using the GLM procedure (SAS, 1988). Treatment means were compared using linear and quadratic orthogonal contrasts. The significance level was established at P<0.05. The model was as follows: Yij =μ+Ti+εij, where Yij is the dependent variables; μ is the overall mean; Ti is the effect of Zn supplementation (i=1, 4); εij is the random error.

老外意见:It would seem that linear and quadratic effects should be included rather than the overall treatment effect. 这句话什么意思?模型建的不对么?请高手帮忙解答一下,谢谢!


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上一主题:[求助]我应该计算这些数据?
下一主题:求spss12.0