Symbols That Math Really Needs: The Causation Coefficient
A symbol for the causation coefficient: ice cream sales and beach visits have r = 0.86 but r꜀ = 0.02.
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Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2016-04-27-symbols-that-math-really-needs--symbols-that-math-really-needs-the-causation-coefficient/ (CC BY-NC 4.0)Transcript
Symbol: r꜀ (r-sub-cause) Meaning: the causation coefficient [board: X = ice cream sales, Y = beach visits] "Intriguing… r = 0.86, but r꜀ = 0.02."