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王小蒙327

新虫 (小有名气)

[求助] 方差分析p值大于0.05,多重比较p值小于0.05请问怎么解释?

方差分析p值大于0.05,多重比较p值小于0.05请问怎么解释?

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晋鹏

版主 (知名作家)

【答案】应助回帖

这个结果是合理的
整体分析接近显著,提示有的差异。可能某些两两组间会不显著,其它某些两两组间又会显著。
完全正确

英文解答如下:
Yes it is possible. The exception is Scheffe's test (which no GraphPad product offers). It is intertwined with the overall F test. If the overall ANOVA has a P value greater than 0.05, then the Scheffe's test won't find any significant post tests. In this case, performing post tests following an overall nonsignificant ANOVA is a waste of time but won't lead to invalid conclusions. But other multiple comparison tests can find significant differences (sometimes) even when the overall ANOVA showed no significant differences among groups.
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2楼2017-08-04 11:33:46
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