I ran ANOVA test to examine the mean differences among four groups and results were found significant at 0.05 Alpha level. Then, I ran Scheffe's post hoc test to see the between-group differences but none of the group showed significant differences between them.
Is it common? If yes, how should i present my results?
Dear Harmandeep,
Yes, it is quite possible for this to happen. It should be written up exactly as you have explained it.
A couple of additional points:
1. Make sure the post hoc test you have chosen is appropriate for your data. Andy Field provides a useful summary of how to do this.
2. If the significance value you obtain lies between 0.05 and 0.1 you can report on it informally as weak evidence to reject the null hypothesis.
Hi dear friend Look at one important point. Scheffe's post hoc is used when we want to make double comparisons simultaneously and together. It is recommended to use the LSD and Bonferroni tests.
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