Meanings
plural interquartile ranges · abbreviation IQR
- mathematicsThe difference between the first and third quartiles; a robust measure of sample dispersion.
A common way of expressing quartiles is as an interquartile range. The interquartile range describes the difference between the third quartile (Q3) and the first quartile (Q1), telling us about the range of the middle half of the scores in the distribution.
2026 February 1 (last accessed), “Measures of Spread”, in Laerd Statistics, archived from the original on 05 Feb 2024Synonyms: midspread
Synonyms & antonyms
nounThe difference between the first and third quartiles; a robust measure of sample dispersion.
More synonyms by meaning
nouna measure of statistical dispersion, being equal to the difference between the upper and lower quartiles.
Synonym sets from Open English WordNet, CC BY 4.0.
Translations
French écart interquartile
- écart interquartilemeasure of sample dispersion
Italian distanza interquartile
- distanza interquartilemeasure of sample dispersion
Portuguese amplitude interquartil
- amplitude interquartilmeasure of sample dispersion
Cite this entry
interquartile range. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/interquartile%20range
“interquartile range.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/interquartile%20range. Accessed November 2, 2026.
WatkinsX Dictionary, s.v. “interquartile range,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/interquartile%20range.
Source: interquartile range on Wiktionary, CC BY-SA 4.0.