regression
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regression [2020/11/05 17:37] – hkimscil | regression [2020/11/17 19:28] – [표준오차 잔여변량 (standard error residual)] hkimscil | ||
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========== 표준오차 잔여변량 (standard error residual) ========== | ========== 표준오차 잔여변량 (standard error residual) ========== | ||
- | < | + | {{ : |
<imgref regression_line_01> | <imgref regression_line_01> | ||
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* $\displaystyle t=\frac{b_{1}}{s_{b_{1}}}$ | * $\displaystyle t=\frac{b_{1}}{s_{b_{1}}}$ | ||
- | * $\displaystyle s_{b_{1}} = \frac {MSE}{SS_{X}} = \frac{\sqrt{\frac{SSE}{n-2}}}{\sqrt{SS_{X}}} = \display\frac{\sqrt{\frac{\Sigma{(Y-\hat{Y})^2}}{n-2}}}{\sqrt{\Sigma{(X_{i}-\bar{X})^2}}} $ | + | * $\displaystyle s_{b_{1}} = \frac {MSE}{SS_{X}} = \frac{\sqrt{\frac{SSE}{n-2}}}{\sqrt{SS_{X}}} = \displaystyle |
^ X ^ Y ^ $X-\bar{X}$ | ^ X ^ Y ^ $X-\bar{X}$ | ||
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SSE = Sum of Square Error | SSE = Sum of Square Error | ||
기울기 beta(b)에 대한 표준오차값은 아래와 같이 구한다. | 기울기 beta(b)에 대한 표준오차값은 아래와 같이 구한다. | ||
- | $$ se_{\beta} = \frac {\sqrt{SSE/ | + | \begin{eqnarray*} |
- | & = & \frac {\sqrt{1.1/ | + | se_{\beta} |
+ | & = & \frac {\sqrt{1.1/ | ||
+ | & = & 0.191485 | ||
+ | \end{eqnarray*} | ||
그리고 b = 0.7 | 그리고 b = 0.7 | ||
따라서 t = b / se = 3.655631 | 따라서 t = b / se = 3.655631 |
regression.txt · Last modified: 2024/05/22 08:19 by hkimscil