定量资料的比较-t检验与方差分析(下)
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作者: 徐涛(中国协和医科大学基础医学研究所流行病统计学系)
视频来源: 中华医学会杂志社
简介:

配对t 检验用于配对设计的两组均数的比较,应用条件为差值d服从正态分布。两独立样本t 检验用于完全随机设计的两组均数的比较,应用条件为两组数据都服从正态分布,且两组总体方差相等。

方差分析用于多组均数的比较,应用条件为各样本均来自正态总体,且各样本的总体方差相等。可根据实验设计的类型选择合适的方差分析方法。

发布时间:2017-01-24 时长:16:15 播放次数:592
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