Construct a time series plot. What type of pattern exists? Develop a forecast for the next month using the averaging method. Develop a forecast for the next month using the naïve last-value method.
Construct a time series plot. What type of pattern exists? Develop a forecast for the next month using the averaging method. Develop a forecast for the next month using the naïve last-value method.
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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Question
Consider the following set of time series sales data for a growing company over the past 8 months:
Month |
Sales |
1 |
15 |
2 |
13 |
3 |
18 |
4 |
22 |
5 |
20 |
6 |
23 |
7 |
22 |
8 |
21 |
- Construct a time series plot. What type of pattern exists?
- Develop a
forecast for the next month using the averaging method. - Develop a forecast for the next month using the naïve last-value method.
- Develop a forecast for the next month using a four-month moving average method.
- Use the Excel Functions SLOPE and INTERCEPT to write the linear regression prediction equation with Months as the independent variable and sales as the dependent variable.
- Use the prediction equation to estimate the number of sales in month 9.
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