(6) 区域机率抽样(area probability sampling): 第一阶段机率抽样 X 第二阶段机率抽样 = 总机率 A. 挑出1/5 街区 X 挑出1/2家户单位 = 1/10 B.
双语例句
1
Based on the principle of the pollution probability, the atmospheric sampling station was set up on the coastal area of upstream wind side where the pollution probability is the highest.