Understanding the confidence interval will help you grasp what an election poll is -- or is not -- saying. As you might have guessed, the media consistently gets it wrong. Candidate Gobermouch is ...

Error bars illustrate the margin of error for a survey estimate by showing how precise that estimate is. Here are some answers to common questions that might help you better understand charts with ...

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 ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

The margin of error allows you to use smaller sample sizes when conducting customer surveys. The measurement directly relates ...

This paper deals with confidence interval estimation and hypothesis testing for components of variance, in analysis-of-variance situations embraced by the Model II of Eisenhart [1], including also the ...

As the director of the Quinnipiac University Poll, which has been taking the pulse of the public on policy issues and elections for the past 30 years, I’ve noted that people have been paying more ...

Sometimes it’s hard to have confidence in science. So many results from published scientific studies turn out to be wrong. Part of the problem is that science has trouble quantifying just how ...

MARGIN OF ERROR….Who’s ahead in the presidential race? Here’s a typical report from early August: An opinion poll released yesterday found Mr. Kerry had the support of 49 per cent of voters, compared ...