问题如下图：
选项：
A. 
B. 
C. 
解释：
在课程中不是说multiple R已经是R square开根号以后的吗，解释中为什么还要再一次将Multi'ple R进行开根号表示correlation?，该知识点在基础班哪里呀？
菲菲_品职助教 · 2018年11月22日
同学你好，这边是multiple R-squared，不是multiple R哦。其实这个multiple R-squared就是我们平常所说的R²，这个multiple只是代表在多元回归下的，跟我们之后说的multiple R还是要区分开。
粉红豹 · 2018年12月13日
multiple R-squared 就是R square 吗？ 最后一句：“这个multiple只是代表在多元回归下的，跟我们之后说的multiple R还是要区分开”，没太懂。。。老师求解释。。。
菲菲_品职助教 · 2018年12月13日
对是的，这两者是一样的。就是说 multiple R-squared ≠ multiple R的意思。
他三哥 · 2020年02月18日
我的天，所以世界上不光是存在R方，还存在Multiple R方，还存在Multiple R，而前两者，是一个东西。
NO.PZ2015120204000016 问题如下 SelecteANOVA Results for Hansen’s RegressionThe most appropriate interpretation of the multiple R-squarefor Hansen’s mol is that: A.unexplainevariation in the pennt variable is 36 percent of totvariation. B.correlation between precteanactuvalues of the pennt variable is 0.36. C.correlation between precteanactuvalues of the pennt variable is 0.60. C is correct.The multiple R-squarefor the regression is 0.36; thus, the mol explains 36 percent of the variation in the pennt variable. The correlation between the precteanactuvalues of the pennt variable is the square root of the R-squareor0.36\sqrt{0.36}0.36= 0.60. rt
NO.PZ2015120204000016 问题如下 SelecteANOVA Results for Hansen’s RegressionThe most appropriate interpretation of the multiple R-squarefor Hansen’s mol is that: A.unexplainevariation in the pennt variable is 36 percent of totvariation. B.correlation between precteanactuvalues of the pennt variable is 0.36. C.correlation between precteanactuvalues of the pennt variable is 0.60. C is correct.The multiple R-squarefor the regression is 0.36; thus, the mol explains 36 percent of the variation in the pennt variable. The correlation between the precteanactuvalues of the pennt variable is the square root of the R-squareor0.36\sqrt{0.36}0.36= 0.60. 不明白这个correlation 就是 R-square 开平方 的结论是哪儿来的。
NO.PZ2015120204000016 问题如下 SelecteANOVA Results for Hansen’s RegressionThe most appropriate interpretation of the multiple R-squarefor Hansen’s mol is that: A.unexplainevariation in the pennt variable is 36 percent of totvariation. B.correlation between precteanactuvalues of the pennt variable is 0.36. C.correlation between precteanactuvalues of the pennt variable is 0.60. C is correct.The multiple R-squarefor the regression is 0.36; thus, the mol explains 36 percent of the variation in the pennt variable. The correlation between the precteanactuvalues of the pennt variable is the square root of the R-squareor0.36\sqrt{0.36}0.36= 0.60. 老师您好，请问下相关系数是R square的开根号不是应该是一元的方程才成立吗？本题是多元方程，为什么C也可以？
NO.PZ2015120204000016问题如下SelecteANOVA Results for Hansen’s RegressionThe most appropriate interpretation of the multiple R-squarefor Hansen’s mol is that:A.unexplainevariation in the pennt variable is 36 percent of totvariation.B.correlation between precteanactuvalues of the pennt variable is 0.36.C.correlation between precteanactuvalues of the pennt variable is 0.60.C is correct.The multiple R-squarefor the regression is 0.36; thus, the mol explains 36 percent of the variation in the pennt variable. The correlation between the precteanactuvalues of the pennt variable is the square root of the R-squareor0.36\sqrt{0.36}0.36= 0.60.R方不是X与Y之间的关系吗，为什么是actuY和precteY直接的关系
NO.PZ2015120204000016 问题如下 SelecteANOVA Results for Hansen’s RegressionThe most appropriate interpretation of the multiple R-squarefor Hansen’s mol is that: A.unexplainevariation in the pennt variable is 36 percent of totvariation. B.correlation between precteanactuvalues of the pennt variable is 0.36. C.correlation between precteanactuvalues of the pennt variable is 0.60. C is correct.The multiple R-squarefor the regression is 0.36; thus, the mol explains 36 percent of the variation in the pennt variable. The correlation between the precteanactuvalues of the pennt variable is the square root of the R-squareor0.36\sqrt{0.36}0.36= 0.60. 讲义中的R-square此处的multiple R-square相等的吗？那么为什么讲义上说R2 of 0.9 incates ththe mol，a whole，explains 90% of the variation in the pennt variable，此处multiple R-square0.36，指的不就是整个方程可以36%的Y吗？但A不是说的是未被的占36%？非常疑惑。虽然错误的选择了B，看了之后理解B错在是说correlation，但不明白A为什么是对的。