The calculation formulas of sample size based on the error limitation are given for estimation of population mean.
对于样本均值估计总体均值，给出了基于误差限制的样本容量的计算式。
Based on error analysis theory, it is deduced that the error of calibrating channel should be no more than one fifth of the tested channel error limitation.
基于误差分析理论，提出校验通道的误差应不大于被试通道误差限的五分之一。
Based on error analysis theory, it is deduced that the error of calibrating channel should be no more than one fifth of the tested channel error limitation.
基于误差分析理论，提出校验通道的误差应不大于被试通道误差限的五分之一。
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