问题如下:
7. Varden’s best answer to Quinni’s question about overall significance is:
选项: R2.
adjusted R2.
C.the F-statistic.
解释:
C is correct. In a multiple linear regression (as compared with simple regression), R2 is less appropriate as a measure of whether a regression model fits the data well. A high adjusted R2 does not necessarily indicate that the regression is well specified in the sense of including the correct set of variables. The F-test is an appropriate test of a regression’s overall significance in 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?