Science · Guess the stat

How well do you know sex ratios and demographics?

Guess the real numbers behind population sex ratios, see how everyone else guessed, and get the source.

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In U.S. birth data, the sex ratio for Black populations runs about 1.03 boys per girl, compared to about what ratio for White populations?

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biological sex demographics
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Sex by the numbers

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a slight decreasing trend

Between 1940 and 2002, the U.S. birth sex ratio stayed within a narrow range and showed what overall trend?

The ratio moved only slightly, from about 1.059 down toward 1.046 male births per female birth over those decades.

Source: Wikipedia (2025) en.wikipedia.org

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How does SexSurvey.com work?

Each question asks you to guess a real number about biological sex demographics. After you answer you see how everyone else guessed, then the real figure and where it comes from.

How is the daily round scored?

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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