Math is still hard

From last week over at badscience, this is one of the most succinct and compelling examples I’ve seen of why everyone needs to know math, particularly prob/stats math. The example centers on a legal case and everyone involved’s inability to compare two conditional probabilities. Or, more properly, that the relevant thing to compare is conditional probabilities. It’s one of those situations where knowing how to do the calculations isn’t as important as knowing what the calculation you should be doing is.

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