can a DMRT( Duncan's Multiple Range Test) result in 11 columns for which i get compact lettering till 'k' (starting from 'a')?
Software used : SPSS v25.0
After i did the post-Hoc with Duncan, i got an output for a specific dependent factor with 18 treatments (3 transcripts of each) as 11 columns.
To put this DMRT result as compact letter display in my table, i'm getting letters 'a' to 'k' for the respective columns.
Is this possible/correct?
significance values for few columns exceeds 0.05. and few are below 0.05.
Hello Ushnish,
If your intention is to show a summary of all possible pairwise comparisons among 18 conditions (= 153 comparisons), that will be a very full tabular display no matter what you do!
If only a few of the comparisons meet your criterion for statistical significance, you might restrict your display and summary to just those comparisons, and note that all others were nonsignificant.
One relevant point is that the Duncan test is likely not the best choice for several technical reasons. Consider something along the lines of the Benjamini-Hochberg method or the Ryan-Einot-Gabriel-Welsh method.
Finally, to address your question about letters, if the Duncan output showed 11 "homogeneous subsets," then yes, you may attach letters a-k as appropriate to show instances of nonsignificant differences (subject to the implied concern above about density of your display).
Good luck with your work.
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