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分层抽样样本单元数的予估,对工作量,精度有决定性的作用。目前在一些文献和有关省的操作技术规定中,用下列公式估算样本单元数n_1=t~2∑W_hC_h~2/E~2……………(1)(1)式是在假定各层的总体平均数Yh
The estimation of the number of stratified sampling samples has a decisive effect on workload and accuracy. At present, in some documents and relevant provincial technical regulations, the following formula is used to estimate the number of sample cells: n_1 = t ~ 2ΣW_hC_h ~ 2 / E ~ 2 (1) Equation (1) The overall average Yh