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

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Academic survey researchers tend to differ ...

Consider a population of 70 individuals, for which you wish to estimate the mean annual income, μ. Assume that you have decided to use the following estimation procedure to make your estimate: simple ...

How four pollsters, and The Upshot, interpreted 867 poll responses: You’ve heard of the “margin of error” in polling. Just about every article on a new poll ...

Pew Research Center’s international surveys are largely conducted via telephone or face-to-face interviews, depending on the country. (The exceptions are the United States and Australia, where surveys ...