Consider the following gasoline sales time series data. Click on the datafile logo to reference the data. Week . Sales (1000s of gallons) 1 16 2. 22 3. 18 4. 23 5. 18 6. 17 7 21 8 17 9 21 10. 21 11 14...

Consider the following gasoline sales time series data. Click on the datafile logo to reference the data.

Week.Sales (1000s of gallons)

1                    16

2.                   22

3.                  18

4.                  23

5.                  18

6.                  17

7                   21

8                   17

9                   21

10.                21

11                  14

12                  23

Using a weight of 1/2 for the most recent observation, 1/3 for the second most recent observation, and  third the most recent observation, 1/6 compute a three-week weighted moving average for the time series (to 2 decimals). Enter negative values as negative numbers.

b. Compute the MSE for the weighted moving average in part (a).
MSE =