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 ...

Doug Schwartz is affiliated with the American Association of Public Opinion Research (AAPOR). As the director of the Quinnipiac University Poll, which has been taking the pulse of the public on policy ...

I am a statistician, and part of my job is to make inferences and predictions. With unlimited time and money, I could simply test or survey the entire group of people I am interested in to evaluate ...

In just about any discussion of a poll about the very close presidential race between Vice President Kamala Harris and former President Donald Trump, you'll hear the ...

In just about any discussion of a poll about the very close presidential race between Vice President Kamala Harris and former President Donald Trump, you’ll hear ...

While previous sections of this report have focused on the kinds of systematic biases that may be the largest worry when it comes to public opinion polls, the variance (or precision) of estimates is ...

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 ...