variable sampling fraction
... 计量抽样 variable sampling 计量抽样率 variable sampling fraction 计量抽样计画 variable sampling plan ...
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包括分层抽样下样本轮换的估计量公式和最优样本轮换率的确定方法。再接着利用前面介绍的理论知识，结合上海市城镇住房空置率抽样调查数据进行实证分析。
Based on the theory and method introduced before, this paper applied the rotation models to compute the sample rotation rate of sampling survey on vacancy rate of households in Shanghai.
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