Correlation doesn’t imply causation

Correlation doesn't imply causation

The warning “correlation doesn’t imply causation” is very common in statistics. In fact, a search on Google Books reveals that the phrase was first used in the 1880s, and its use exploded in the 1990s and 2000s (perhaps due to the growth of the web at the time – or that may merely be a correlation). An article in Slate thinks the phrase is over-used and employed too often to kill debate; correlation may not imply causation, but it “sure as hell provides a hint”.

H/T Eric Falkenstein

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