### Definition of F distribution

**1.** Noun. (statistics probability) A probability distribution of the ratio of two variables, each with a chi-square distribution; used in analysis of variance, especially in the significance testing of a correlation coefficient (R squared). ¹

¹ *Source: wiktionary.com*

### Medical Definition of F distribution

**1.**
The distribution of the ratio of two independent quantities each of which is distributed like a variance in normally distributed samples. So named in honor of the English statistician and geneticist R.A. Fisher.
(05 Mar 2000)

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