The regression equation created with the sales (Y) and advertising expenditures (X) of 30 companies is as follows: like this: Y =1.48+0.37X R? =0.852 The auxiliary regression equation is as follows:...

Extracted text: The regression equation created with the sales (Y) and advertising expenditures (X) of 30 companies is as follows: like this: Y =1.48+0.37X R? =0.852 The auxiliary regression equation is as follows: e, =-0.115+0.016 X -0.044 e,-1-0.092e,_2 -0.408e,_3 R? = 0.162 Test whether the error terms are autocorrelated. a = 0.10