Log-in to bookmark & organize content - it's free! CBS Elections and Surveys Director Anthony Salvanto discussed the idea of margin of error and how sampling error ...

He demonstrates that a large number of polls generating seemingly dissimilar results actually produced estimates within the margin of sampling error, except for just one or two of them.

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 ...

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 ...