This study, sponsored by Pew Research Center, used online opt-in survey data collected by three commercial vendors. Each vendor provided their own sample and administered the survey themselves, based ...
This study looks at how national public opinion polling in the United States changed from 2000 to 2022. It focuses on two aspects: the sample source(s) – that is, where the survey takers came from – ...
Survey sampling and estimation methods form the cornerstone of modern statistical inference, underpinning research across the social, medical, and natural sciences. At their heart, these methods ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results