问题如下图：
选项：
A. 
B. 
C. 
解释：
这道题没太明白，adjusted R2不是所有independent variables能够解释多少的dependent variables么，为何不能说明整个回归方程的significance?
NO.PZ201709270100000307 7. Varn’s best answer to Quinni’s question about overall significanis: R2. austeR2. the F-statisti C is correct. In a multiple lineregression (comparewith simple regression), R2 is less appropriate a measure of whether a regression mol fits the ta well. A high austeR2 es not necessarily incate ththe regression is well specifiein the sense of inclung the correset of variables. The F-test is appropriate test of a regression’s overall significanin either simple or multiple regressions. 解析当中的这句话理解不了，麻烦老师给一下
7. Varn’s best answer to Quinni’s question about overall significanis: R2. austeR2. the F-statisti C is correct. In a multiple lineregression (comparewith simple regression), R2 is less appropriate a measure of whether a regression mol fits the ta well. A high austeR2 es not necessarily incate ththe regression is well specifiein the sense of inclung the correset of variables. The F-test is appropriate test of a regression’s overall significanin either simple or multiple regressions. 老师请问，对于显著性来说，R2是只针对一元回归？F statistic是针对多元回归？
F统计量怎么能看出来过度拟合的？为什么不是Aust R2
没看明白，我选的B-_-||
