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What Are Pollster Ratings?

In the weeks leading up to the 2020 general election, different pollsters told very different stories about who would win. Some managed to get pretty close to the actual result: a 4.5 percentage point win for Joe Biden. But some polls showed a landslide victory for Biden, and others showed a win for Donald Trump. So why did some pollsters get the outcome so right while others got it so wrong? In this episode of Polling 101, FiveThirtyEight database journalist Dhrumil Mehta (a.k.a. Professor Polls) walks us through the update of FiveThirtyEight’s Pollster Ratings and explains what makes a good pollster.

[Related: The Death Of Polling Is Greatly Exaggerated]

Don’t believe anything 2020 exit polls tell you | FiveThirtyEight

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Dhrumil Mehta is a database journalist at FiveThirtyEight focusing on politics.

Michael Tabb is a video and motion graphics producer at FiveThirtyEight.

Anna Rothschild is FiveThirtyEight’s senior producer for video.