Kriskal-Wallis H Test Calculator

Kruskal-Wallis H Test Calculator

Instructions:

1. Paste your data into the box below (include headers).
2. Click "Load Data" and then select the appropriate columns.
3. Select **one** Grouping Variable and **one or more** Dependent Variables.
4. Click "Run Analysis" to get the results.

Formula Used

The Kruskal-Wallis H test is performed here. The primary formula is:

Kruskal-Wallis H Statistic:

H = [(12 / N(N+1)) * Σ(R_i²/n_i)] - 3(N+1)

For data with ties, a **correction factor (C)** is applied:

C = 1 - [Σ(t³ - t) / (N³ - N)]

The corrected statistic is then **H_corrected = H / C**, and this is the value reported as the Chi-Square statistic.

Where:
N = Total number of observations across all groups.
n_i = Number of observations in group 'i'.
R_i = Sum of the ranks for group 'i'.
t = Number of tied observations for a given rank.

Select Your Variables

Grouping Variable (Select One)

Dependent Variable(s) (Select One or More)

Confidence Level: 90% 95% 99%