Simpson's paradox

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

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Notion

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Beliefs and thought

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What Wikipedia says

Simpson's paradox is a phenomenon in probability and statistics in which a trend appears in several groups of data but disappears or reverses when the groups are combined.

Excerpt from the Wikipedia article “Simpson's paradox”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Schutz, Public domain, via Wikimedia Commons.