Society · Facts & sources
4 sourced facts about surveys, polling and public-opinion research, each with the context behind the number. 4 more are in today's round and appear here after it closes.
Answer6%
That capped a long decline -- response rates had held around 9% for several years before dropping further.
Source: Pew Research Center (2018) pewresearch.org
Answer99%
Gallup surveys people in more than 160 countries to reach that level of coverage.
Source: Gallup (2005) gallup.com
Answerabout 6%
The same study found the drop-off actually slowed for even longer surveys, with only a 10% reduction by 40 questions.
Source: Wikipedia: Survey methodology (2010) en.wikipedia.org
Answer95%
A 3-point margin of error at the 95% confidence level means repeating the poll would land within 3 points of the truth 95% of the time.
Source: Wikipedia: Opinion poll en.wikipedia.org