Question

Question #4a4d3

Answer 1

`square`?

Explanation:

a) State the underlying assumptions for the classical linear regression model stated below:

`y_i = beta_0+beta_1x_i+beta_2z_i+e_i`

b) Graphically illustrate the following assumptions:

`E(?_i)=0`, `sigma(?)= ?_2`, `sigma(?_l) ? ?_2`