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

Gudbjartsson and colleagues (June 11 issue) 1 reveal important insights into the transmission of SARS-CoV-2. An aspect of their study that merits further exploration is the positive test results in ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...