<p>设一元线性回归模型：<img src="https://file.gaojiufeng.cn/learnAppQuestion/b5/23/b523b41e907e218a48c662a51dcf7c40.jpg" style="width: 100%;height: auto;">且各<img src="https://file.gaojiufeng.cn/learnAppQuestion/e1/94/e19401241ef83e1d4b7b6c41cf750955.jpg" style="width: 100%;height: auto;">相互独立.依据样本<img src="https://file.gaojiufeng.cn/learnAppQuestion/9b/76/9b76af1513aed5bb24a3967222932174.jpg" style="width: 100%;height: auto;">得到一元线性回归方程<img src="https://file.gaojiufeng.cn/learnAppQuestion/fc/37/fc372b9f18102fe99932a94e2154023d.jpg" style="width: 100%;height: auto;">，由此得<img src="https://file.gaojiufeng.cn/learnAppQuestion/86/38/86388f9a16252e07f44ec4a28bbbc295.jpg" style="width: 100%;height: auto;">对应的回归值为<img src="https://file.gaojiufeng.cn/learnAppQuestion/5f/dc/5fdcdf6509694fe78a64dce0371da4af.jpg" style="width: 100%;height: auto;">，<img src="https://file.gaojiufeng.cn/learnAppQuestion/31/e1/31e1558698666bac9449f546a1134303.jpg" style="width: 100%;height: auto;">的平均值<img src="https://file.gaojiufeng.cn/learnAppQuestion/db/5e/db5ee80b3330d424acac266b28a22be4.jpg" style="width: 100%;height: auto;">，则回归平方和<img src="https://file.gaojiufeng.cn/learnAppQuestion/07/0b/070babe33a3aea0d5669e4ab5268c6d5.jpg" style="width: 100%;height: auto;">为</p>