The following data shows the quarterly sales of the LukeHydro tents at a Aubrey Sporting Goods Store. The store owner wants to forecast the quarterly sales for the next year. (a) Construct a time series plot. What type of pattern exists in the data? (b) Use dummy variables and multiple regression to find a multiple regression equation that accounts for seasonal effects in the data (c) Based on this model, estimate the quarterly sales for the fourth year. Year 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 Quarter 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 a Q1 a Q2 Q3 Sales 74 53 61 82 71 45 65 87 67 57 58 78
The following data shows the quarterly sales of the LukeHydro tents at a Aubrey Sporting Goods Store. The store owner wants to forecast the quarterly sales for the next year. (a) Construct a time series plot. What type of pattern exists in the data? (b) Use dummy variables and multiple regression to find a multiple regression equation that accounts for seasonal effects in the data (c) Based on this model, estimate the quarterly sales for the fourth year. Year 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 Quarter 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 a Q1 a Q2 Q3 Sales 74 53 61 82 71 45 65 87 67 57 58 78
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:2
3 The following data shows the quarterly sales of the LukeHydro tents at a Aubrey Sporting Goods Store.
4 The store owner wants to forecast the quarterly sales for the next year.
5
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(a) Construct a time series plot. What type of pattern exists in the data?
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(b) Use dummy variables and multiple regression to find a multiple regression equation that accounts for seasonal effects in the data.
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10 (c) Based on this model, estimate the quarterly sales for the fourth year.
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Year
1
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4
Quarter
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2
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Q1
Q2
Q3
Sales
74
53
61
82
71
45
65
87
67
57
58
78
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