猪日粮对比试验的分析方法研究

在猪日粮对比试验资料中,常常包括试验初始重等影响试验结果但不是试验结果的因素。统计分析时必须考虑这类连续性变量,以降低残差方差,提高检验功效。这类资料常用的分析方法为协方差分析法。首先介绍了协方差分析的统计学假设及其检验方法,然后给出了协方差分析法。本文的所有分析方法都利用SAS实现,详细介绍了如何阅读SAS程序结果。

Analysis of swine diet comparison experiments

The data of swine diet comparison experiments usually contain non-experimental effects that affect the response variables,such as the initial body weight.Analysis of covariance was used to take account these continuous variables to reduce the residual effect variance and increase the power of the test.The assumptions and their testing methods were first presented,then analysis of variance was briefed.All the data analysis methods were implemented with SAS,and the outputs of SAS were detailed.