Search Results for: “trump voters 2020”

report | Sep 7, 2023

1. Assessing the accuracy of estimates for U.S. adults

To gauge each sample’s accuracy on general population estimates for all U.S. adults, we calculated the weighted percentage of adults belonging to 77 categories across 28 different variables and compared them to corresponding benchmarks derived from high-quality government data sources. The benchmarks covered a variety of topics, including voting, health, and respondents’ work, family and […]

report | Sep 7, 2023

Comparing Two Types of Online Survey Samples

Pew Research Center conducted a study to compare the accuracy of six online surveys of U.S. adults – three from probability-based panels and three from opt-in sources. On average, the absolute error on opt-in samples was about twice that of probability-based panels.

report | Sep 7, 2023

2. Assessing the accuracy of estimates among demographic subgroups

The accuracy of general population estimates is only one facet of data quality for online samples. Frequently, survey researchers also want to understand the similarities and differences between subgroups within the population. For probability-based panels recruited using ABS, obtaining a sufficiently large sample of respondents belonging to small subgroups can be particularly costly, and one […]

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