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IQR

IQR IQR, or interquartile range, is the difference between the 75th percentile and the 25th percentile of a set of scores.

IQR, or interquartile range, is the difference between the 75th percentile and the 25th percentile of a set of scores. It is a measure of variability that is relatively resistant to the influence of extreme values.

Sources

Drafting source: Online Statistics Education, version 2 (David M. Lane, project leader). Version 2; publisher statement snapshot 2026-10-18; SHA-256 0dcad9ee85f61f9e2bb24d26279de155ac749164ea4da2a3bffeabcf9ea471a6. “Interquartile Range” (interquartile_range.html).
public-domain-US · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: 8d63b7b36cc53700183071c9bcb48b8b31f2a8c65c034a64cbc228dc851977d4

These citations identify the drafting sources. 2/2 independent reader passes against the pinned source packet. The drafter does not count as a reader. Source institutions do not endorse this dictionary.

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “IQR.” Development preview.

Version 1 · SHA-256: 4503e18d5dbeb860a0ce37eaaeec563fa8615c4c67863fa38db395ff359d9cb3

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IQR

See also

Sources

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