回归估计的标准误
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回归估计的标准误 [2023/04/07 08:32] – 创建 戴娉婷 | 回归估计的标准误 [2024/04/12 11:40] (当前版本) – aiyuheng | ||
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- | ==== 回归估计的标准误 ==== | + | ==== 回归估计的标准误(Standard error of regression estimation) |
1、回归方程是一种预测,但并未给出预测准确性的信息; | 1、回归方程是一种预测,但并未给出预测准确性的信息; | ||
2、回归估计的标准误给出回归线和数据点之间标准距离的量度; | 2、回归估计的标准误给出回归线和数据点之间标准距离的量度; | ||
+ | 1. The regression equation is a prediction, but it does not give information about the accuracy of the prediction; | ||
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+ | 2, the standard error of regression estimation gives a measure of the standard distance between the regression line and the data point; | ||
---- | ---- | ||
- | === 如何计算回归估计的标准误 === | + | === 如何计算回归估计的标准误(How to calculate the standard error of regression estimation) |
- | 1、首先计算误差和方 | + | 1、首先计算误差和方(First calculate the error sum of squares) |
SS< | SS< | ||
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+ | 2、将误差的和方除以自由度,开方 | ||
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+ | 自由度为:df = n-2 | ||
+ | Divide the sum of the errors by the degrees of freedom, square root | ||
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+ | The degrees of freedom are: df = n-2 | ||
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+ | S< | ||
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+ | ---- | ||
+ | === 标准误和相关系数之间的关系(The relationship between standard error and correlation coefficient) === | ||
+ | SS< | ||
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+ | |||
回归估计的标准误.1680856362.txt.gz · 最后更改: 2023/04/07 08:32 由 戴娉婷