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 (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 ?
5] values in the third and fourth quartiles had higher SBP than participants in the lowest quartile of P[M.
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.
Less than 3% of large-cap and mid-cap stock funds that placed in the top quartile of rankings as of September occupied that ranking two years later, according to the S&P scorecard.
For purposes of this secondary analysis, participants were divided into quartiles according to baseline age: Quartile 1 patients were up to 54 years old; quartile 2 were ages 55-60; quartile 3 were ages 61-67; and quartile 4 were ages 68 and up.
In patients with metabolic syndrome who are in the highest-risk quartile for progression to diabetes (predicted mean 3-year risk, 60%), metformin, 850 mg twice daily, reduces the absolute risk by about 20% over a 3-year period.
Emerson is introducing new peer benchmarking insights to bring better perspective on best practices and technologies to achieve Top Quartile performance in the areas of safety, reliability, production and energy management.
Major sex differences were seen in that results from women comprised 80% of the results of quartile 1 and only 36% of the results of quartile 4, P < 0.
Analyzing data from the National Health and Nutrition Examination Surveys, researchers report in "The Relationship between Dietary Fiber Intake and Lung Function in NHANES," that among adults in the top quartile of fiber intake:
2012), that measure was then recoded into quartiles to indicate four different levels of care experience, ranging from quartile 1 (i.
Women with higher binding inhibitory capacity at delivery were less likely to deliver LBW babies (odds ratio <1 for all quartiles in comparison to first quartile; p = 0.