Tag Archives: Statistics

Put a Hat on It

In statistics, there is a symbol known simply as a “hat.” It looks like this: ^. According to Wikipedia (the grad student’s seedy dealer, from whom you can never academically admit getting your stuff), the hat operator “is used to denote an estimator or an estimated value.”

Seriously, we call “p” just “p” (like the actual letter), and “hat_p” is called “p hat.” It doesn’t get much lazier than that.

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