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抽样误差、非抽样误差 和偏差的概念 森林抽样调查的主要特点是通过调查资料数据分析,可以估算误差,提出调查的精度。但计算精度是否真实?不少地区做了实测验证,绝大多数检验结果是成功的,而且实际精度大都高于理论精度,个别情况下实际误差大于理论误差,实际精度恰恰等于理论精度的情况是极为罕见的。为了防止过多地发生实际误差大于计算误差的情况,对并
The concept of sampling error, non-sampling error and deviation The main characteristic of forest sampling survey is that through the analysis of survey data, the error can be estimated and the accuracy of investigation can be put forward. However, the accuracy of calculation is true? Many areas have done the actual test verification, most of the test results are successful, and the actual accuracy are mostly higher than the theoretical accuracy, the actual error is greater than the theoretical error in some cases, the actual accuracy precisely equal to the theoretical accuracy of the situation is Extremely rare. In order to prevent excessive occurrence of the actual error is greater than the calculation of the error of the situation