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线性回归中的R，R平方和调整后的R平方有什么区别？ - 知乎
线性回归中的r你指的是相关系数吧，就是用来描述两个变量的线性相关程度。r绝对值越大表示2个变量间的线性相关程度越高。 线性回归中的 R 2 是决定系数，表示自变量（可能有多个）对 …
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外星人笔记本推荐：2025年外星人笔记本选购攻略！含x14/x16/m1…
Dec 8, 2025 · Alienware x14 R2的定位属于“性能小钢炮”那种类型，但是整体性能不算激进，适合预算充足有信仰、觉得m系列太重、同时有需要机器高性能的办公用户选择。
求教线性回归中决定系数R²多大算有效？R²小于几拟合就不合理 …
求教线性回归中决定系数R²多大算有效？R²小于几拟合就不合理呢？苦于找不到定量R²的文献，求指点！？
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R2稳健型理财风险多大？买R2级理财有亏的吗？ - 知乎
R2稳健型理财风险多大？ 当投资人看到银行理财产品中标注风险等级为R2，许多朋友对R2风险级别不太清楚。 目前风险级别有R1到R5，风险程度依次上升。