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如何计算拟合优度
更新时间: 2020-09-16 00:00:00  

1、拟合以后点右键,趋势线选项,显示R的平方值。

2、拟合优度是指回归直线对观测值的拟合程度。度量拟合优度的统计量是可决系数(亦称确定系数)R的平方。R的平方的取值范围是0到1。R的平方的值越接近1,说明回归直线对观测值的拟合程度越好;R的平方的值越接近0,说明回归直线对观测值的拟合程度越差。

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