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One-way ANOVA Inference for one-way ANOVA - page 30 / 41

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Multiple comparisons

Multiple comparison tests are variants on the two-sample t-test.

They use the pooled standard deviation sp = √MSE.

The pooled degrees of freedom DFE.

And they compensate for the multiple comparisons.

We compute the t-statistic for all pairs of means:

A given test is significant (µi and µj significantly different), when

|tij| ≥ t** (df = DFE).

The value of t** depends on which procedure you choose to use.

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