夏雪xiao96021 · 2020年02月26日
问题如下：
The from regressing Y on X is the same as the of regressing X on Y. True or false?
选项：
解释：
True. The in a regression with a single explanatory variable is the squared sample correlation between X and Y.
No.PZ2020010801000005 (问答题)
The R^2
R2
from regressing Y on X is the same as the R^2
R2
of regressing X on Y. True or false?
为什么一样的是true呢
R2
from regressing Y on X 。是代表x可以反应R2的Y。
R2
of regressing X on Y，是代表Y可以反应R2的X。不一样呀，所以我觉着是flase，麻烦老师解释一下，
NO.PZ2020010801000005问题如下The R2R^2R2 from regressing Y on X is the same the R2R^2R2 of regressing X on Y. True or false?True. The R2R^2R2 in a regression with a single explanatory variable is the squaresample correlation between X anY.老师，推导的红线不明白，方差是（Y估计-Y均值）^2求和后还要求均值呢，为什么只是平方和就直接等于Y的方差了？第二个红线也是，为什么只是求和就直接是X的方差了？
NO.PZ2020010801000005问题如下The R2R^2R2 from regressing Y on X is the same the R2R^2R2 of regressing X on Y. True or false?True. The R2R^2R2 in a regression with a single explanatory variable is the squaresample correlation between X anY.R2为什么等于ρ2？老师课上只说了结论，不太明白为什么，可以证明吗
