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Margin of Error and Confidence Levels: Make the Most of Your Customer Surveys

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

Customer Experience Survey: Calculating the Right Sample Size

Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...
University of California

Election polls are 95 percent confident but only 60 percent accurate, UC Berkeley Haas study finds

How confident should you be in election polls? Not nearly as confident as the pollsters claim, according to a new UC Berkeley Haas study. Most election polls report a 95 percent confidence level. Yet ...
Pew Research Center

Understanding error bars in charts

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 ...