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    "线性回归实际上满足下面三个假设：\n",
    "\n",
    "1. 因变量 y 和自变量 x 之间是线性关系；\n",
    "2. 自变量 x 和干扰项 e 相互独立；\n",
    "3. 没有被线性模型捕捉到的随即因素 e 服从正态分布；"
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