The margin of error allows you to use smaller sample sizes when conducting customer surveys. The measurement directly relates to the size of your sample, with larger ...

When pollsters screw up their predictions—as so many of them have in recent election years—they like to say that the results were “well within the margin of ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Every survey finding published by Pew Research ...