I would like to discuss results of contrasts run in Minitab.
Can you explain why the difference in the p-values for the runs of Dunnett contrast and fisher, please?
1. Dunnett compare groups 1-4
2. contrast (1,0,0,-1) run as y=contrast
3. fisher (1,0,0,-1) run as y=salt
Why do these p-value differ? See attached file for summary.
MM