Discover how attribute sampling enhances audit accuracy by evaluating internal controls and analyzing population traits, ...

Oct. 8, 2008— -- Surveys based on a random sample of respondents are subject to sampling error – a calculation of how closely the results reflect the attitudes ...

Discover how simple random sampling ensures accurate and unbiased population research, offering efficiency and fairness over ...

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 ...