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diff --git a/ai-slides.tex b/ai-slides.tex index cc38c42..32c53c3 100644 --- a/ai-slides.tex +++ b/ai-slides.tex @@ -543,7 +543,8 @@ Least squares line. $\hat{Y}=\hat{\beta}_0 + \hat{\beta}_1 X$. \includegraphics[width=0.99\textwidth]{ISLR_Fig3_3.png} \end{center} -参数估计的标准错误(standard error)，$\mathrm{SE}(\hat{\beta})$。 +参数估计也是随机变量，在不同的训练集上有不同的参数估计。参数估计的标准 +错误(standard error) $\mathrm{SE}(\hat{\beta})$。 \begin{center} \includegraphics[width=0.99\textwidth]{ISLR_Eq3_8.png} |