Spurious

beautifully meaningless correlations

Encyclopaedia Britannica print sets sold

correlates with

US counties reporting good air quality days

r = -0.97998% · 2002-2012
Encyclopaedia Britannica print sets soldUS counties reporting good air quality days

These two datasets have a 98% correlation over 2002-2012. Remember: correlation does not imply causation. But it does waggle its eyebrows suggestively.

spuriouscorrelation ≠ causation

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