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Anscombe 四重奏:统计量一模一样的四组数据,为何只有散点图敢说真话?

【锚点】论文正文里那行 r=0.816、y=3+0.5x,保护不了一个被离群点绑架的结论。Anscombe 四重奏要教的事只有一件:统计量相同 ≠ 数据相同。 【流程节点链路】起点:只读摘要中的相关系数与回归方程 → 中间节点:把四组数据逐一画成散点图 → 终点:相同统计量背后是四种完全不同的分布结构,可视化不是装饰,而是检验。 【显式】Anscombe(1973, The American…

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