## quartile

quar·tile- any of the values in a series dividing the distribution of the individuals in the series into four groups of equal frequency
- any of these groups

Origin of quartile

Medieval Latin*quartilis*; from Classical Latin

*quartus,*fourth: see quart

## quartile

noun

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.

Origin of quartile

Middle English,*90 degrees apart (of the relative position of two celestial bodies)*, from Old French

*quartil*, from Medieval Latin

*quart&imacron;lis*,

*of a quartile*, from Latin

*quartus*,

*fourth*; see

**quart**.

## quartile

Noun

(*plural* quartiles)

- (statistics) Any of the three points that divide an ordered distribution into four parts, each containing a quarter of the population.
- (statistics) Any one of the four groups so divided.
*This school is ranked in the first quartile.*