多元线性回归模型的矩阵表示 Y=Bo+BIXu+-+ BkXx1+Er o i kXk+E X B En B B 1X, X=(,X1…,X) 1X, Y=Bo+B, B,x,++Bxxx+E=xB+9 多元线性回归模型的矩阵表示 n n K K n K K Y X X Y X X         = + + + + = + + + +    0 1 1 1 0 1 1 1 1 1           = Yn Y Y  1           = i n i i X X X  1           = 1 1 l            =  K    0           = n     1 ( )           = = n Kn K K X X X X X l X X     1 1 1 1 1 1 1 , , , Y =  +  X +  X + +  X +  = X +  0 1 1 2 2  K K