| 材积方程中异方差的检验和校正 |
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| 引用本文： | 钟义山.材积方程中异方差的检验和校正[J].河北林果研究,1991(1). |
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| 作者姓名： | 钟义山 |
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| 作者单位： | 西北林学院 |
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| 摘 要： | 本文提出了通过检验剩余绝对值和自变量的等级相关系数,检验材积方程模型异方差性的方法。用加权最小二乘法估计异方差的材积方程参数,有效地克服了村积的异方差性,提高了材积方程的适用精度。
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| 关 键 词： | 剩余绝对值 等级相关系数 异方差模型 加权最小二乘法 |
TESTING AND CORRETING THE HETERO SCEDASTICITY OF VOLUME EQUATION MODEL |
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| Zhong Yishan.TESTING AND CORRETING THE HETERO SCEDASTICITY OF VOLUME EQUATION MODEL[J].Hebei Journal of Forestry and Orchard Research,1991(1). |
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| Authors: | Zhong Yishan |
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| Institution: | Northwestern College of Forestry |
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| Abstract: | In this paper, the method of testing model heteroscedasticity for volume equations by testing rank correlation coeffients between absolute residuals and independent variables is presented. Estimating the parameters of the volume equations of heteroscedastic model by the method of weighted least squares effectively corrects the non-homogeneity of the volume variance and greatly raises the accuracy of the applicability of volume equations. |
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| Keywords: | abslute residuals rank correlation coefficients heteroscedastic model method of weighted least squares |
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