The monthly sales for Yazici Batteries, Inc., were as follows:
Practical Management Science
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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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
Transcribed Image Text:The monthly sales for Yazici Batteries, Inc., were as follows:
MONTH
SALES
January
20
February
21
March
15
April
14
May
13
June
16
July
17
August
18
September
20
October
20
November
21
December
23
a) Plot the monthly sales data
b) Forecast January sales using each of the following:
i) Naive method
ii) A 3-month moving average
iii) A 6-month weighted average using .1, .1, .1, .2, .2, and .3, with the
heaviest weights applied to the most recent months
IV) Exponential smoothing using a = .3 and a September forecast of 18
v) A trend projection
c) With the data given, which method would allow you to forecast next
March's sales?
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