A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years: Year Sales (000): 1 37.60 2 3 4 5 6 9 42.40 49.30 53.40 55.20 57.70 60.80 69.20 74.70 Click here for the Excel Data File a. Using an appropriate model, forecast textbook sales for each of the next five years. (Round your intermediate calculations 3 decimal places and final answers to 2 decimal places.)
A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years: Year Sales (000): 1 37.60 2 3 4 5 6 9 42.40 49.30 53.40 55.20 57.70 60.80 69.20 74.70 Click here for the Excel Data File a. Using an appropriate model, forecast textbook sales for each of the next five years. (Round your intermediate calculations 3 decimal places and final answers to 2 decimal places.)
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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Transcribed Image Text:Year
Forecast
10
Year
Sales (000):
11
01
O No
O Yes
b. Compute +/- 2s control limits for the control chart for forecast errors using just data from the original nine periods. (Round
your intermediate calculations to 4 decimal places and final answer to 2 decimal places.)
Control limits are
12
c. Suppose actual sales for the next five years turn out as follows:
10
11
12
13
77.20 84.10 88.50 91.50
Is the forecast performing adequately?
13
14
96.50
14

Transcribed Image Text:A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years:
Year
Sales (000):
Year
Forecast
1
37.60
10
Click here for the Excel Data File
a. Using an appropriate model, forecast textbook sales for each of the next five years. (Round your intermediate calculations t
3 decimal places and final answers to 2 decimal places.)
Year
2
42.40
0+
10
3
49.30
11
11
4
5
7
8
53.40 55.20 57.70 60.80 69.20 74.70
b. Compute +/- 2s control limits for the control chart for forecast errors using just data from the original nine periods. (Round
your intermediate calculations to 4 decimal places and final answer to 2 decimal places.)
Control limits are
c. Suppose actual sales for the next five years turn out as follows:
12
12
13
13
14
14
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