how to represent the following in a linear model y=Xb + e whereb' = (u,a1,a2,a3,y1,y2,y3) ande'=(e11,e12,e13,e21,e22,e23,e31,e32,e33)
' means transpose
y11=u+a1+y1+e11
y12=u+a1+y2+e12
y13=u+a1+y3+e13
y21=u+a2+y1+e21
y22=u+a2+y2+e22
y23=u+a2+y3+e23
y31=u+a3+y1+e31
y32=u+a3+y2+e32
y33+u+a3+y3+e33
X is a matrix pattern but I am confused about 1 and 0placement
Also can X'X and X'y be determined and written in normalequations
