11+28.9000X₁ con to view the data table. = 22.1
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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Question

Transcribed Image Text:The accompanying data represent the yearly amount of solar power installed (in megawatts) in a particular area from
2000 through 2008. The trend forecasting equations below were found, where X is the number of years after 2000.
Complete parts (a) through (d) below.
= -10.711 +28.9000X₁
₁ = 22.70 +0.259X; +3.5801X?
Click the icon to view the data table.
a. Compute the standard error of the estimate (Syx) for each model.
Linear
Quadratic
Syx
22.431
8.032
(Round to three decimal places as needed.)
b. Compute the MAD for each model.
Linear
Quadratic
MAD
64.222
66.873
(Round to three decimal places as needed.)
c. On the basis of (a) and (b) and the principle of parsimony, which forecasting model would you select?
The model with the smallest values of Syx and MAD should be used, which is the quadratic model.

Transcribed Image Text:Yearly Amount of Solar Power Installed
Year
2000
2001
2002
2003
2004
2005
2006
2007
2008
Amount
(megawatts)
Print
17
29
40
67
81
104
140
212
254
Done
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