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My ANOVA says the three groups aren't all equal, but it won't tell me which ones actually differ.
What you'll have at the end
A table showing exactly which pairs of groups differ, with a p-value for each pair
You need
The output from an already-run one-way ANOVA showing a significant result across three or more groups: each group's mean, standard deviation and sample size, plus the test's mean square error (MSE) and its error degrees of freedom.
Not covered
Diagnosing why the different group actually differs day to day, or correcting for many unrelated metrics checked at once across a whole dashboard.
Which of your dashboard's flagged metrics survive a correction for multiple testing?
once you're checking many unrelated metrics across a whole dashboard rather than every pair inside one ANOVA, that's a different correction problem
Your data fails normality; try a nonparametric test instead
if the groups clearly aren't normally distributed to begin with, the nonparametric route replaces both the ANOVA and this post-hoc step
Checked 26 Aug 2026
Part of the Statistics Fundamentals cookbook