Society · Guess the stat

How well do you know polling?

Guess the real numbers behind surveys and public-opinion polling, see how everyone else guessed, and get the source.

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In what year did Gallup launch its World Poll, which now surveys nearly every country on Earth?

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  • 1 opinion poll
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Polling by the numbers

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6%

By 2018, about what share of people contacted for a typical Pew Research phone survey actually responded?

That capped a long decline -- response rates had held around 9% for several years before dropping further.

Source: Pew Research Center (2018) pewresearch.org

99%

About what share of the world's adult population does Gallup's World Poll now cover?

Gallup surveys people in more than 160 countries to reach that level of coverage.

Source: Gallup (2005) gallup.com

95%

A poll's margin of error is usually reported at what confidence level?

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

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Each question asks you to guess a real number about surveys, polling and public-opinion research. After you answer you see how everyone else guessed, then the real figure and where it comes from.

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