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上一讲的双重抽样法,实际是结合直线回归的一种抽样调查法。现在介绍一种结合方差分析的抽样调查法。这种抽样调查叫做二阶抽样调查。是大面积森林调查中既省人力又能得一定精度的一种抽样调查法。
The double sampling method we talked about above is actually a sampling method that combines linear regression. Now introduce a sample analysis method of variance analysis. This sample survey is called a second-order sample survey. Is a large area of ?? forest surveys both manpower and have a certain accuracy of a sample survey.