# Friedman test

Revision as of 20:01, February 12, 2006 by Lifeartist (Talk | contribs)

*34,192*pages on

this wiki

Assessment |
Biopsychology |
Comparative |
Cognitive |
Developmental |
Language |
Individual differences |
Personality |
Philosophy |
Social |

Methods |
Statistics |
Clinical |
Educational |
Industrial |
Professional items |
World psychology |

**Statistics:**
Scientific method ·
Research methods ·
Experimental design ·
Undergraduate statistics courses ·
Statistical tests ·
Game theory ·
Decision theory

The **Friedman test** is a non-parametric statistical test developed by the U.S. economist Milton Friedman. The procedure involves ranking each row (or *block*) together, then considering the values of ranks by columns.

## MethodEdit

- Given data , that is, a tableau with rows (the
*blocks*), columns (the*treatments*) and a single observation at the intersection of each block and treatment, calculate the ranks*within*each block. Replace the data with a new tableau where the entry is the rank of within block . - Find the values:
- ,

- The test statistic is given by .
- Finally, the p-value is given by .