decision rule of F:In the multiple regression analysis,The F-statistic(□is/■is not)the square of the t-statistic for the partial slope coefficient.老师,这句话是因为这个F=t2只在一元中成立吗?
然后,为什么?
Adjusted R2 has following characteristics:adjusted R²(■decrease/□increase)if adding additional variable
问题:增加自变量X,一定会使得adjusted R2变小吗?
是不是如果增加的自变量X和其余X不相关,那么就不会使得adjusted R2变小?
会不变吗?会变大吗?
能否详细讲一下呀?