Reference no: EM13576801

Use the gasoline sales time series data from Table to show the exponential smoothing forecasts using a = 0.1. Using the mean squared error criterion, would you prefer a smoothing constant of a = 0.1 or a = 0.2?

TABLE GASOLINE SALES TIMES SERIES

Week Sales (1000s of gallons)

1 ..............................17

2 ..............................21

3 ..............................19

4 ..............................23

5 ...............................18

6 ..............................16

7 ..............................20

8 ..............................18

9 ..............................22

10 ..............................20

11 ..............................15

12 ..............................22