Definition of quartile in English:


Line breaks: quar|tile
Pronunciation: /ˈkwɔːtʌɪl


  • 1Each of four equal groups into which a population can be divided according to the distribution of values of a particular variable: in the highest quartile, the mean age was 72
    More example sentences
    • Children in the upper quartile of the blood-lead-concentration distribution donated another blood sample in February 1993.
    • White women were older, smoked more, and were less likely to have dietary calcium intakes in the lowest quartile of distribution than black and Hispanic women.
    • The school is one of several elementary schools within a district that is in the bottom quartile when fourth grade standardized test scores and passage rates are compared throughout the state.
  • 1.1Each of the three values of the random variable which divide a population into quartiles.
    More example sentences
    • Every measurement was first divided by its plate's quartile and then multiplied by the average quartile of the respective experiment.
    • Simple quartiles cannot be defined in interval variables unless their boundaries chance to fall at interval boundaries.
    • We calculate medians and quartiles of the age at leaving home by sex and race, using a fitted curve derived from a logit regression model.


late 19th century: from medieval Latin quartilis, from Latin quartus 'fourth'.

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