条件变异系数经常被用于理解统计数据的局部变异程度。

Conditional Coefficient of Variation has been often used in understanding the local variability of statistical data.

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通过正交试验分析获得较优的萃取条件，并对锌元素作添加回收试验，得回收率为96.24%， 变异系数为0.64%；

Betterextract condition is obtained with orthogonal test, and the zinc element is put to the ad-dition and recovery test. The method give recoveries of 96.24%, variation coefficient of0.64%.

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相同条件下多次采集的数据变异系数<4%，说明该系统操作具有可重复性；检测结果最大相对误差为4.4%，满足微量组分检测的准确度要求。

Using this system, the chroma values of ten samples can be obtained once and the variable coefficients are lower than 4% and the maximum of relative errors is 4.4%.

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