论文部分内容阅读
一、可变概率小班抽样法定义将总体按特定的组合方式划分为若干小班,小班不等大,以小班作为抽取单位。其抽样概率与小班面积大小成比例。再在抽出的小班中,对小班进行详查,以其数据估测总体,求得总体平均数,总量及其抽样误差的无偏估计。
First, the variable probability sampling definition of small classes will be based on a specific combination of the general classification is divided into a number of small classes, ranging from small classes to small classes as the extraction unit. The probability of sampling is proportional to the size of a small class. Then in the extracted small class, a detailed examination of small classes, with its data to estimate the overall, to obtain the overall average, the total amount of sampling errors and unbiased estimates.