quartile

From Middle French quartil, from Medieval Latin quartilus.

• IPA^(key): /ˈkwɔː(ɹ)taɪl/

• Audio (Southern England)

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quartile (plural quartiles)

1. (statistics) Any of the three points that divide an ordered distribution into four parts, each containing a quarter of the population.
2. (statistics) Any one of the four groups so divided.

   This school is ranked in the first quartile.

   • 2021 July 28, Paul Clifton, “Network News: Confusion and dissent over face mask requirements: Reaction to the Guidance: British Safety Council”, in RAIL, number 936, page 6:

     The Department for Transport's National Travel Survey shows that workers in the lowest income quartile are twice as likely to use public transport.

• quantile

• (statistics): median (2-quantile), tercile/tertile (3), quartile (4), quintile (5), sextile (6), septile (7), octile (8), decile (10), hexadecile (16), ventile/vigintile (20), centile/percentile (100), millile (1000)

• interquartile range

• “quartile”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.

• requital

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quartile m (plural quartiles)

1. quartile

• “quartile”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.