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Points facts & stats

4 sourced facts about surveys and opinion polling, each with the context behind the number. 4 more are in today's round and appear here after it closes.

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The basics

For a typical opinion poll of about 1,000 people, what margin of error does that sample size usually produce?

Answerabout plus or minus 3%

A sample of roughly 1,000 people is the standard size behind most national polls you see reported in the news.

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

Going deeper

About how many robocalls does the U.S. receive per month, a major reason survey response rates keep falling?

Answerabout 3.4 billion

With billions of robocalls flooding phones every month, legitimate survey calls are often mistaken for spam and ignored.

Source: Pew Research Center (2019) pewresearch.org

By late 2022, what share of U.S. adults lived in a household with no landline at all, wireless-only?

Answerabout 72.6%

Nearly three-quarters of American adults now live in cellphone-only households, a huge shift for pollsters built around landlines.

Source: CDC, National Health Interview Survey (2022) cdc.gov

Expert level

When Singapore began using early 'sample count' results on election night, what margin of error did officials cite?

Answerabout 4%

Singapore's election-night sample counts, drawn from partial ballots, are designed to give a fairly accurate early read.

Source: Wikipedia, Sampling (statistics) (2015) en.wikipedia.org

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