Use the sales data given below to determine:

Year Sales (units) Year Sales (units)
1995 130 1999 169
1996 140 2000 182
1997 152 2001 194
1998 160 2002 ?

(a) The least squares trend line.
(b) The predicted value for 2002 sales.
(c) The MAD.
(d) The unadjusted forecasting MSE.


(a) = 119.14 + 10.46X
(b) 119.14 + 10.468. = 202.82
(c) MAD = 1.01
(d) MSE = 1.71

Business

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