100 points total. Show work for partial credit.

1. Use this table to answer the following. Use a linear regression forecast and a double exponential smoothing forecast (alpha = 0.3, beta = 0.6, F(1) = 250, T(1) = 0). (6+6 = 12)

Period	Demand	LR Forecast	DES Forecast	F(t)	T(t)
1	260
2	255
3	273
4	260
5	259
6	283
7	286
8	271
9	299
10	307
11	303
12	296
13	295
14	315
15	326
16	332
17	337
18	345
19	323
20	335
21	320
22	315
23	322
24	312
25

1. Calculate the Mean Forecast Error for the 24 periods. (2)

MFE(LR) = _________, MFE(DES) = _________

2. Calculate the Mean Absolute Deviation for the 24 periods. (2)

MAD(LR) = _________, MAD(DES) = _________

3. Calculate the Mean Absolute Percent Error for the 24 periods. (2)

MAPE(LR) = _________, MAPE(DES) = _________

4. Which forecast is better? (1) Why? (1)