quartile

quart-,四，四分之一，-ile,形容词后缀。引申词义四等分，四分位数。

quartile (n.)

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).

1. The upper quartile is that value above which 25 per cent of the observations lie.

上四分位数是25%的观察值位于其上的值.

2. Those in the quartile of FEV 1 decline were defined as fast declines.

FEV1下降的四分位数最高值即定义为快速减退.

3. There were Therefore only 28 % of students in the top quartile are from lowerlower - income families.

因此,在高水平学生中只有28%的人来自 低收入 家庭.

4. Furthermore, this series is the first one in which patients have been distributed according to quartile.

此外, 该系列研究第一次采用四分位数法对患者分组.

5. Results SUA in quartile correlated with increasing IMT and severity of plaque in the elderly.

结果血尿酸四分位组分析显示,随分位数增加,老年人颈动脉IMT及斑块严重程度增加.