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Outliers in ANOVA and multcompare

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Madalena João
Madalena João on 2 Dec 2020
Answered: Jeff Miller on 2 Dec 2020
Hi,
Does ANOVA1 and multcompare functions include the outliers in the analysis?
If not, how can I force to do that?
Thanks!

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Answers (1)

Jeff Miller
Jeff Miller on 2 Dec 2020
Yes, outliers are included. (Scores are considered outliers only for the purposes of the boxplots.)
The way you can tell is that the total df in the ANOVA table is 1 less than the total number of scores. If outliers were dropped, this total df value would drop correspondingly.

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