Correlation is not Causation, clearly

Repeat after me:

Internet Explorer vs Murder Rate Will Be Your Favorite Chart Today

We discussed causation and correlation in my Methods class this morning. I generally use the ice cream sales and murder rates example, but since this has been floating around the internet lately, I figured I would throw it in. It got a few chuckles out my class, from those who also wanted to insist that ice cream made people deranged and thus more likely to murder someone, but a good reminder nonetheless. A regression of murder rates on ice cream sales or internet explorer market share will have a positive and statistically significant coefficient estimate, but it doesn’t mean that either is causing more murders to occur.

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