MethodsMay 12, 2017

Video Explainer: Understanding random sampling for public opinion surveys

The first video in our “Methods 101” series is about random sampling, a concept that undergirds all probability-based survey research. Here’s how it works.

MethodsNovember 15, 2016

Video: Why 2016 election polls missed their mark

The results of the 2016 presidential election came as a surprise to nearly everyone who had been following the national and state election polling