A.50% B.40% C.70% D.60%
A.1994 B.1996 C.1995 D.1993
A.回歸方程的系數(shù) B.預(yù)測(cè)時(shí)期自變量的值 C.預(yù)測(cè)年份 D.相應(yīng)的預(yù)測(cè)值