Also found in: Thesaurus, Medical, Financial, Encyclopedia, Wikipedia.


 (kwôr′tīl′, -tĭl)
n. Statistics
1. Any of the groups that result when a frequency distribution is divided into four groups of equal size.
2. Any of the values that separate each of these groups.

[Middle English, 90 degrees apart (of the relative position of two celestial bodies), from Old French quartil, from Medieval Latin quārtīlis, of a quartile, from Latin quārtus, fourth; see quart.]


1. (Statistics) statistics one of three actual or notional values of a variable dividing its distribution into four groups with equal frequencies
2. a quarter part of a distribution
3. (Statistics) statistics denoting or relating to a quartile
4. (Astrology) astrology denoting an aspect of two heavenly bodies when their longitudes differ by 90°
[C16: from Medieval Latin quartīlis, from Latin quartus fourth]


(ˈkwɔr taɪl, -tɪl)

(in a frequency distribution) one of the values of a variable that divides the distribution of the variable into four groups having equal frequencies.
[1875–80; « Latin quārt(us)]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quartile - (statistics) any of three points that divide an ordered distribution into four parts each containing one quarter of the scores
mark, score, grade - a number or letter indicating quality (especially of a student's performance); "she made good marks in algebra"; "grade A milk"; "what was your score on your homework?"
statistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters


[ˈkwɔːtaɪl] Ncuartil m


[ˈkwɔːtaɪl] nquartile m
References in periodicals archive ?
The researchers found that the risk for AMD was increased in association with the highest quartile of each air pollutant compared with the lowest exposure quartile.
(5) In 2015, the rehospitalization rates from SNFs in the highest quartile of rehospitalization were double those in the lowest quartile.
They then separated the participants into quartiles according to their maximal muscle power, with quartile one being low and quartile four being high.
Upon dividing the patients within the normal range into quartiles based upon their free [T.sub.4] level, he and his coinvestigators found that the baseline prevalence of atrial fibrillation was 8.7% in those in quartile 1, 9.3% in quartile 2, 10.5% in quartile 3, and 12.6% in quartile 4.
The research team defined high variability as the highest quartile, classifying participants according to the number of high-variability parameters.
Within the competitive cyclists considered "very fit", demographic quartiles were established (Statistica[TM], Statsoft) based on their maximal oxygen consumption (V[O.sub.2] max) values with quartile 1 being the "least fit" and quartile 4 being the "most fit".
All employers with 250 or more employees must calculate and publish a set of data which includes their mean and median gender pay gap, their mean and median bonus gender pay gap, the proportion of men and women receiving bonuses and the proportion of men and women in each quartile pay band.
Based on the crude model, participants with P[M.sub.2.5] values in the third and fourth quartiles had higher SBP than participants in the lowest quartile of P[M.sub.2.5], and those in the second, third, and fourth quartiles had higher PP than participants in the lowest quartile of P[M.sub.2.5] (Table 3).
The fraction of mortgage delinquencies accounted for by the lowest quartile of credit scores dropped from the normal 40% to 30% and the fraction of foreclosures from 70% to 35%.
When the 310 children with ASDs were compared with 1,240 control participants, the risk of ASDs was significantly increased in each of the three lower quartiles of Vitamin D level at birth, when compared with the highest quartile - an increased risk of ASDs by 260 per cent in the lowest quartile, 150 per cent in the second quartile, and 90 per cent in the third quartile.
The analysis shows US Buyout/Growth deals in the top quartile are priced with the highest premium paid for revenue since 1999, while EBITDA multiples are steady.
These dummies denote EF observations belonging in the second, third, and fourth quartiles of the distribution; the comparison group is always the bottom quartile and thus the lowest economic freedom.