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For a typical political opinion poll with about 1,000 respondents, what is the usual margin of error?

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surveys, polling and public-opinion research
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2.3 million

In the famous 1936 polling failure, how many people did the Literary Digest survey before wrongly predicting the US election?

Despite the huge sample, biased selection of respondents made the poll wildly wrong, while Gallup's much smaller scientific sample got it right.

Source: Wikipedia, Opinion poll (2024) en.wikipedia.org

about 160 countries

About how many countries does Gallup's World Poll survey, covering most of the world's adults?

That covers more than 98% of the world's adult population.

Source: Wikipedia, Gallup (company) (2024) en.wikipedia.org

about 1,000 residents

Roughly how many people has Gallup traditionally surveyed per country for its World Poll?

A sample of about 1,000 per country is enough to estimate national opinion within a few percentage points.

Source: Wikipedia, Gallup (company) (2024) 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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Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.

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