Answered: b. Use a multiple linear regression…

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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b. Use a multiple linear regression model with dummy variables as follows to develop an equation to account for seasonal effects in the data: Qtr1 = 1 if quarter 1, 0 otherwise; Qtr2 = 1 if quarter 2, 0 otherwise; Qtr3 = 1 if quarter 3, 0 otherwise. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank.

c. Compute the quarterly forecasts for next year.

(b) Use a multiple linear regression model with dummy variables as follows to develop an equation to account for seasonal effects in the data: Qtrı = 1 if quarter 1, 0 otherwise; Qtr2
= 1 if quarter 2, 0 otherwise; Qtr3 = 1 if quarter 3, 0 otherwise. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (Example: -300)
Qtri +
Qtr2
Qtr3
(c) Compute the quarterly forecasts for next year.
Year Quarter
Ft
4
1
4
2
4
3
4
4.

Quarter Year 1 Year 2 Year 3
對
71
68
62
2.
49
41
51
58
53
寸
78
81
72

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