c. 1500, originally in astronomy; see quartile (adj.). In statistics, from 1879.
quartile (adj.)
mid-15c., "90 degrees apart" (of astronomical measurements), from Middle French quartil, from Medieval Latin quartilus "of a quartile," from Latin quartus "fourth" (see quart).
例文
1. The upper quartile is that value above which 25 per cent of the observations lie.
上の4分位数は、25%の観察値がその上にある値である。
2.Those in the quartile of FEV 1 decline were defined as fast declines.
FEV 1が低下した4分位数の最高値は、急速減退と定義されている。
3.There were Therefore only 28%of students in the top quartile are from lowerlower-income families.
したがって、高レベルの学生のうち低所得家庭から来た人は28%に過ぎない。
4.Furthermore，this series is the first one in which patients have been distributed according to quartile .
また、このシリーズの研究では初めて4分位数法を用いて患者をグループ化した。
5.Results SUA in quartile correlated with increasing IMT and severity of place in the elderly.