Question 16 Suppose that (x1,y1),...,(n,yn) are n observations. Consider the simple linear regression model, yi = Bot Bi(xi-x) tei ei~ N(0,02) (1) with the er independent. Let Bo and B1 be the least squares estimates of Bo and B1. Let E be the ith residual, i.e. ci=yi-Bo -B1(xi -x). 1. Please choose the correct answer: (a) [(xi -I) = 3. i= 1 (b) [(xi -x) =-1. (c ) in E(xi -x) =0. i= 1 (d) None of the above