---
title: "POST /friedman/{post_hoc}/{control}/{alpha}"
method: POST
path: "/friedman/{post_hoc}/{control}/{alpha}"
tags: ["non parametric", "multiple groups", "control method", "unpaired"]
---

# POST /friedman/{post_hoc}/{control}/{alpha}

`POST /friedman/{post_hoc}/{control}/{alpha}`

Performs a Friedman ranking test. Tests the hypothesis that in a set of k dependent samples groups (where k >= 2) at least two of the groups represent populations with different median values. <br> More info in [STAC Python Documentation](http://tec.citius.usc.es/stac/doc/stac.nonparametric_tests.friedman_test.html).

## Path parameters

- `post_hoc` string[], required
- `control` string, required
- `alpha` number, float, required

## Request body

- Data — unresolved $ref

## Response `200`

Successful response

## Other responses

- `400` — Bad request/body parameters

---

[API](https://skmtc.dev/citiususc/apis/stac-api.md) · [All operations](https://skmtc.dev/citiususc/apis/stac-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/citiususc/stac-api/revisions/f7b5e94bf503/schema)