四分差 ( interquartilerange, IQR ),又称四分位距 。 是描述统计学中的一种方法,以确定第三四分位数和第一四分位数的区别(即 的差距) 。 与方差 、 标准差一样,表示统计资料中各变量分散情形,但四分差更多为一种稳健统计 ( robuststatistic )。
差分四相相移键控 differential quadrature phase keying ; DQPSK ; differential quadrature phase shift keying ; DQPSK Differential Quadrature PSK
四相差分相移键控 quadrature differential phase shift keying ; QDPSK ; DQRSK
四分位偏差 [数] quartile deviation ; quartile limits
差分四相移相键控 DQPSK ; differential quarter phase-shift key
四分位差系数 [统计] coefficient of quartile deviation
四阶差分 fourth-order difference ; Four order difference
四分位差 Quartile Deviation
即四分位数差 interquartile range ; IQR
四分位变差系数 coefficient of quartile deviation
四位分差系数 coefficient of quartile deviation
差四分六点。
在范围和目的性以及清晰程度和呈现方式上的得分稍高(前者:平均得分:0.82,四分位差IQR:0.58-0.89;后者:平均得分:0.67,IQR:0.50-0.78)。
Scores were better for the domains of scope and purpose (median: 0.82, interquartile range, IQR: 0.58–0.89) and clarity and presentation (median: 0.67, IQR: 0.50–0.78).
她眼见他只花了她四分之一的时间就把连衣裙平安无事地熨烫好了,而且不得不向马丁承认他烫得不比地差。
In a quarter of the time it would have taken her she saw the shirt-waist safely ironed, and ironed as well as she could have done it, as Martin made her grant.
Just as I foreshadowed, if you look at the difference between the first and third quartile in the bond market -these are active returns over a ten-year period again ending June 30,2005 -and the fixed income market, the difference between first and third quartile is a half a percent per annum.
如我之前所示,如果观察,债券市场中的第一和第三个四分位数,四分位数即统计学中,把所有数值由小到大排列并分成四等份三个分割点位置分别就是三个四分位数 考虑十年期的主动型的收益,截止于2005年6月30日,在债券这个固定收益市场,第一和第三个四分位数,每年只差0.5%
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