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confidence interval

[ kon-fi-duhns in-ter-vuhl ]

noun

, Statistics.
  1. a range of values above and below a given statistic, with a specified probability that the true value falls within that range: the span of the interval is equal to twice the margin of error: Compare interval estimation.

    An overview of 20 studies revealed that calcium supplements reduced the risk of total fracture, showing a relative risk of 0.89 with a 95% confidence interval of 0.81 to 0.96.

confidence interval

noun

  1. statistics an interval of values bounded by confidence limits within which the true value of a population parameter is stated to lie with a specified probability

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Word History and Origins

Origin of confidence interval1

First recorded in 1930–35

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