1·Objective To study the effect of covariate imbalance on analysis of covariance.
目的探讨协变量的不均衡对协方差分析的影响。
2·Method: Dummy variable is used for analysis of covariance and analysis of variance.
方法：在协方差分析与方差分析中使用哑变量。
3·By analysis of covariance we compared the difference of MDI and PDI between the two groups.
运用协方差分析法比较两组婴儿MDI和PDI的差异。
4·By analysis of covariance the differences of MDI and PDI between the two groups were compared.
运用协方差分析法比较两组婴儿MDI和PDI的差异。
5·The results were compared and analyzed with the t test and analysis of covariance between the two groups.
两组间结果比较采用t检验及协方差分析法进行分析。
6·Conclusion: It is easy to understand the analysis of covariance and analysis of variance can also be considered in regression analysis setting by defining appropriate dummy variables.
结论：在协方差分析中使用哑变量使对模型的理解变的简单，在方差分析中使用哑变量使得可以从回归的角度来理解模型。
7·Linear model is a vital class of statistical model which involves regression model, variance analysis model, covariance analysis model and mixed model etc.
线性模型是一类很重要的统计模型，它包括回归模型、方差分析模型、协方差分析模型以及混合模型等。
8·We use the covariance analysis method to appraise teaching efficiency and provide an important basis for scientific management of teaching.
利用协方差分析方法评价教学效率，为教学的科学管理提供了重要依据。
9·By the analysis of airborne gravity measurement data, this paper constructs a space covariance function model with spatial characteristics.
本文通过对航空重力测量数据的分析，建立起具有空间相关特性的空间协方差函数模型。
10·We see from the results of the SVD analysis that, the contribution of the modes explaining less squared covariance percentage must be considered for some regions and some periods.
分析发现，模态方差的大小只反映模态对整个分析时段和整个分析区域贡献的大小，但对某些时段、某些区域来说，方差较小模态的贡献很大；