Calculate the forecast for week 16 using  - a 2-period moving avergage - a 3-period moving average

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Calculate the forecast for week 16 using 

- a 2-period moving avergage

- a 3-period moving average

 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
A
Week
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
C
Actual Sales 2-period MA
1486
1345
1455
1368
1209
1178
1581
1332
1245
1521
1544
1502
1856
1753
1789
B
1415.5
1400
1411.5
1288.5
1193.5
1379.5
1456.5
1288.5
1383
1532.5
1523
1679
1804.5
1771
Error
D
39.5
-32
-202.5
-110.5
387.5
-47.5
-211.5
232.5
161
-30.5
333
74
E
Error²
F
3-period MA Error
1344
1386
1366
G
1560.25
1024 1428.66667 -60.666667 3680.44444
-166
41006.25 1389.33333 -180.33333 32520.1111
12210.25
27556
150156.25 1251.66667 329.333333 108460.444
2256.25 1322.66667 9.33333333 87.1111111
44732.25 1363.66667 -118.66667 14081.7778
54056.25
1634
135
178
H
Error²
119
25921
930.25 1436.66667 65.3333333 4268.44444
110889 1522.33333 333.666667 111333.444
5476
14161
-15.5 240.25 1703.66667 85.3333333 7281.77778
-1771 3136441 1799.33333 -1799.3333 3237600.44
18225
31684
Transcribed Image Text:1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 A Week 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 C Actual Sales 2-period MA 1486 1345 1455 1368 1209 1178 1581 1332 1245 1521 1544 1502 1856 1753 1789 B 1415.5 1400 1411.5 1288.5 1193.5 1379.5 1456.5 1288.5 1383 1532.5 1523 1679 1804.5 1771 Error D 39.5 -32 -202.5 -110.5 387.5 -47.5 -211.5 232.5 161 -30.5 333 74 E Error² F 3-period MA Error 1344 1386 1366 G 1560.25 1024 1428.66667 -60.666667 3680.44444 -166 41006.25 1389.33333 -180.33333 32520.1111 12210.25 27556 150156.25 1251.66667 329.333333 108460.444 2256.25 1322.66667 9.33333333 87.1111111 44732.25 1363.66667 -118.66667 14081.7778 54056.25 1634 135 178 H Error² 119 25921 930.25 1436.66667 65.3333333 4268.44444 110889 1522.33333 333.666667 111333.444 5476 14161 -15.5 240.25 1703.66667 85.3333333 7281.77778 -1771 3136441 1799.33333 -1799.3333 3237600.44 18225 31684
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