17.A time series model of sales volume has the following trend and additive seasonal variation:Trend:
Y=5,000+4,000X
where Y = quarterly sales volume in units,
X = the quarter number (where the first quarter of 20X1 = quarter 17, the second quarter of 20X1 = quarter 18, etc)
What would be the time series forecast of sales units for the third quarter of 20X2?
A.79,500
B.95,500
C.97,000
D.98, 500
答案：95,500
Quarter number for third quarter of 20X2= 23(18+1+1+1+1+1)
Forecasted sales units for third quarter of 20X2 = 95 ,500 ((5,000 + (4,000 X 23))- 1 ,500)
