The accompanying data file contains 20 observations for t and y_t.

Use the 3-period moving average for making forecasts.

Note: Do not round intermediate calculations. Round final answers to 2 decimal places.

t y y^t

1 57 -

2 52 -

3 44 -

4 46 __?__

5 49 __?__

: : :

20 61 __?__

Use the in-sample forecast errors to compute MSE, MAD, and MAPE.

Note: Do not round intermediate calculations. Round final answers to 2 decimal places.

Performance Measure Value

MSE ________

MAD _________

MAPE (%) ________

Make a forecast for period 21.

Note: Do not round intermediate calculations. Round final answer to 2 decimal places.

y^21 = _________

t	yt
1	57
2	52
3	44
4	46
5	49
6	57
7	68
8	65
9	83
10	78
11	90
12	98
13	99
14	94
15	87
16	84
17	84
18	75
19	67
20	61