Assignment:
For the data below:
Year Automobile Sales Year Automobile Sales
1990 116 1977 119
1991 105 1998 34
1992 29 1999 34
1993 59 2000 48
1994 108 2001 53
1995 94 2002 65
1996 27 2003 111
(a) Determine the least squares regression line.
(b) Determine the predicted value for 2004.
(c) Determine the MAD.
(d) Determine the unadjusted forecasting MSE.
Provide complete and step by step solution for the question and show calculations and use formulas.