Understanding error bars in charts
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 error bars.
A behind-the-scenes blog about research methods at Pew Research Center.
For our latest findings, visit pewresearch.org.
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Identifying partisan ‘leaners’ in cross-national surveys
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How we review code at Pew Research Center
As part of our quality control process, we review code with a series of interim reviews during a project and a formalized code check at the end.
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Nonresponse rates on open-ended survey questions vary by demographic group, other factors
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Testing survey questions about a hypothetical military conflict between China and Taiwan
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