Quartile meaning

kwôrtīl, -tĭl
Frequency:
The value of the boundary at the 25th, 50th, or 75th percentiles of a frequency distribution divided into four parts, each containing a quarter of the population.
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Any of the values in a series dividing the distribution of the individuals in the series into four groups of equal frequency.
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Any of these groups.
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(statistics) Any of the three points that divide an ordered distribution into four parts, each containing a quarter of the population.
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(statistics) Any one of the four groups so divided.

This school is ranked in the first quartile.

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Origin of quartile

  • 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 quart

    From American Heritage Dictionary of the English Language, 5th Edition