Statistical Thinking

Making sense of bias and variance!

A beginner-friendly primer on two fundamental data science concepts

Cassie Kozyrkov
4 min readMay 27, 2022

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What is bias?

Depends where you’re hearing the word. I’ve made a tongue-in-cheek laundry list of various bias usages for your amusement, but in this article, we’ll focus on one specific species of bias — statistical bias —which I’ll explain in a moment.

Target practice

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Chief Decision Scientist, Google. ❤️ Stats, ML/AI, data, puns, art, theatre, decision science. All views are my own. twitter.com/quaesita