摘要
本文首先介绍了回归估计的基本概念和基本原理,例如,总体回归直线方程,相关系数,样本回归直线方程;其次给出了总体平均数和总体函数值的回归估计方法,特别是回归估计效率的概念;最后,又列举了如何利用回归估计的实例,该例具有一定的参考价值与实用价值。总之,在森林调查中,回归估计可以提高估计精度和减少抽样误差。
In the artical, the basic concepts and basic principles of regression estimate, for instance, population regression linear equation, coefficient of correlation, sample regression linear equation were introduced.And then the regression estimate methods for checking population means and values of function of population speciality, the concepts of efficiency of regression estimates were described. Finally, some examples of referential Value were given to show how to use regression estimate method in researches . The regression estimates may increase precision of estimation and decrease sampling errors in forest survey、
关键词
森林
回归估计
抽样调查
相关系数
regression estimate
linear regression
coefficient of correlation
