I asked participants of a survey to rate the competence of 10 stimuli and want to see whether the stimuli differ significantly. I conducted a repeated measurements ANOVA and tested whether competence ratings significantly differs as a function of stimuli. It was not significant. Then I excluded two stimuli from the ANOVA and it became significant. How is that possible?
Asked
Active
Viewed 61 times
3
-
Possible duplicate of How to test the statistical significance for categorical variable in linear regression? – kjetil b halvorsen Feb 27 '17 at 16:15
-
1@kjetilbhalvorsen, the questions are clearly related, but I'm not sure that's an obvious duplicate. – Matt Krause Feb 27 '17 at 19:55
-
Then there are other very similar posts which are better candidates for duplicates! – kjetil b halvorsen Feb 27 '17 at 20:02