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在工程地质实践中,回归分析和相关分析(以下统称回归分析)的应用已越来越广泛。但无论是这种方法本身,或是它的正确运用,当前都存在一些需要研究和改进的问题。本文就其中某些实践中常见的问题进行探讨。一、正态变方差母体的回归方法当前通用的回归分析方法,是以正态常方差母体为数学模型,它要求数据围绕回归线作正态分布并具有恒定的方差。设回归方程为y =f(x),当x取任意值x_i时,y的回归值为Y_i,随机值为y_(ij),随机值对回归
In engineering geology practice, the application of regression analysis and related analysis (hereinafter referred to as regression analysis) has become more and more extensive. However, whether it is the method itself or its correct application, there are currently some issues that need to be studied and improved. This article discusses some of the common problems in some of these practices. First, the regression method of the normal variable-variance matrix The current universal regression analysis method is based on the normal-variance-matrix matrix. It requires the data to be normally distributed around the regression line and has a constant variance. Let the regression equation be y = f(x). When x takes any value x_i, the regression value of y is Y_i, the random value is y_(ij), and the random value is the regression