Statistics and Probability · Estimation

Confidence intervals

A range, instead of a single number, built to contain the true value a stated percentage of the time.

Also known as: interval estimation, margin of error.

Start a lesson on Confidence intervals

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• Point estimation: Using sample data to produce a single best-guess number for an unknown population value.

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• Hypothesis testing basics: Checking whether observed data is surprising enough to reject a specific default assumption, the null hypothesis.

Related topics

• Hypothesis testing basics: Checking whether observed data is surprising enough to reject a specific default assumption, the null hypothesis.