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方差分析可用以检验那些因素的作用是显著的,当因素的水平m≥3,如方差分析得出的结论为该因素各水平间差异显著时,一般地说并不一定所有的各水平两两之间都有显著差异,某些水平间的十分显著差异往往可以掩盖某些水平之间的差异不显著,而使总的结论为差异显著。进一步弄清哪一些水平之间差异显著,哪一些水平之间不显著,对解决实际问题是很有意义的。
Analysis of variance can be used to test the effect of those factors is significant, when the level of the factor m ≥ 3, such as variance analysis concluded that the factors significantly different levels, generally not all levels of each two There are significant differences between the level of some of the very significant differences can often mask some differences between the level of insignificance, leaving the conclusion of the total significant difference. Further clarification of which of the levels is significant and which of the levels are not significant makes sense in solving practical problems.