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摘要:本文根据Iwao的m—m分析方法和Lloyd提出的平均拥挤度的计算公式,从统计学的角度推导了Iwao的两条实施序贯抽样的界限方程,讨论了Iwao序贯分析图的绘制方法,比较了这种抽样方法与其它序贯抽样之间的关系。结果表明:Iwao的序贯抽样实质上就是参数估计的推广应用,他的两条界限方程就是参数估计的上、下区间值与抽样单元数的乘积。用Iwao方法对同一总体所作出的检验结果与其它方法所得出的结果是不完全相同的。
Abstract: According to Iwao’s m-m analysis method and Lloyd’s formula for calculating average crowding degree, this paper deduces Iwao’s two bounding equations for sequential sampling from a statistical point of view, and discusses the drawing of Iwao’s sequential analysis graph Method to compare the relationship between this sampling method and other sequential samplings. The results show that Iwao’s sequential sampling is a generalized application of parameter estimation. The two boundary equations are the product of the upper and lower interval values of the parameter estimation and the number of sampling units. The results of Iwao’s test on the same population are not exactly the same as those obtained by other methods.