Dunn's Test

Tap a term to see what it means, or .

Calculate

Example: the same three fertilizers as in Kruskal-Wallis, which signalled some difference. Which pairs of fertilizers actually differ? Change the values to work out your own case.

Groups One group per row, separated by semicolons; at least three.

Step by step

What each term means

Pair z Statistic: How many standard errors separate two groups' mean ranks. Compared with the normal, it gives the pair's p-value, which is then adjusted for the number of comparisons.
Difference in Mean Ranks: The ranks are the same as in Kruskal-Wallis: all values sorted together.
Standard Error: It depends on the total N and the size of the two groups. With ties, a correction term is subtracted.

When to use it, assumptions and alternatives: Dunn's test in the statistical tests catalog.