Quick guide
How to use this calculator
- Enter the observations, probabilities, model parameters, or summary statistics requested by the visible labels.
- Keep every value on the same scale and confirm that the selected sampling relationship, distribution, and tail convention match the question you are investigating.
- Read the result together with its assumptions and interpretation. Statistical output summarizes uncertainty under a model; it does not repair biased data or establish causation.
Calculation method
How the friedman test calculator works
Q=[12/(nk(k+1))]ΣRj²−3n(k+1), with tie correction.
The omnibus result indicates some condition difference and requires multiplicity-aware paired follow-up.
Worked example
Friedman Test example
Each subject row is ranked internally so stable between-subject levels do not dominate the comparison.
Q=[12/(nk(k+1))]ΣRj²−3n(k+1), with tie correction.
Supported inputs
Precision and limits
Model and design
Rows are independent complete blocks, columns are related conditions, and measurements are at least ordinal.
Input scope
Category lists accept up to 10,000 nonblank observations and render up to 200 distinct labels. Matching trims outer whitespace but remains case-sensitive; no numeric ordering or distance is inferred.
Interpretation
The omnibus result indicates some condition difference and requires multiplicity-aware paired follow-up.
Decision boundary
The calculator does not validate how data were collected, diagnose dependence or bias, choose a scientifically meaningful effect, or replace review by a qualified statistician for consequential research, medical, regulatory, safety, or policy decisions.
Privacy
Entered values and calculated results stay in this browser and are not sent to an analytics service.
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