Consider the multiple regression model y = xβ+∈. the gauss-markov conditions hold.
answer the following questions:
a. show that the least-squares estimates can be expressed in the form = β +a∈. what is a? show that the fitted values can be expressed as = β + what is b?
b. show that the error sum of squares can be expressed as .
c. show that e'x = 0.
d. show that = 0