# Simpson's paradox

> English word · Proper noun

## Definitions
1. The observation that the association of two variables for one subset of a population may be similar to the association of those variables in another subset, but different from the association of the variables in the total population.

## Etymology
Edward H. Simpson first described this phenomenon in a technical paper in 1951.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/simpson-s-paradox