description |example | calculator (will open in new window)

M = treatment/group mean
n = number per treatment/group


  1. Calculate an analysis of variance (e.g., One-way between-subjects ANOVA).
  2. Select two means and note the relevant variables (Means, Mean Square Within, and number per condition/group)
  3. Calculate Tukey's test for each mean comparison
  4. Check to see if Tukey's score is statistically significant with Tukey's probability/critical value table taking into account appropriate dfwithin and number of treatments.