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一、一元线性回归分析也叫二元线性相关分析(或简称直线相关分析),它是研究有直线相关关系(即大体上成比例地变化)的二个变量间的联系形式和相关密切度的。为此,首先要通过观测或化验收集到这两个变量(设为x与y)相互对应的足够多的数据对(x_1,y_1),(x_2,y_2)(X_n,Y_n)。其中n一般应大于15为好,否则分析结果不大可靠。1.作散点图把每个数据对(x_i,y_i)作为一个点画在平面直角坐标系上,就构成这几个数据对的
First, a linear regression analysis is also called binary linear correlation analysis (or simply referred to as linear correlation analysis), it is to study the relationship between the linear (ie, generally proportional to the change) between the two variables and the type of contact between the close . To do this, we first collect enough pairs of data (x_1, y_1), (x_2, y_2) (X_n, Y_n) corresponding to each of these two variables (set x and y) by observation or laboratory analysis. Which n should generally be greater than 15 as well, otherwise the analysis results are not reliable. 1. For scatter plot Each data pair (x_i, y_i) as a point in the Cartesian coordinate system, constitute the data pairs