Siena Ltd attempts to find the trend of its sales over the past five years. Siena is considering which model that best represent the trends of its sales. Following are the result of linear and exponential model trend analysis: a. Calculate the MSE and MAD for the linear trend model b. Calculate the MSE and MAD for the exponential trend model c. Which model that performs better
Siena Ltd attempts to find the trend of its sales over the past five years. Siena is considering which model that best represent the trends of its sales. Following are the result of linear and exponential model trend analysis: a. Calculate the MSE and MAD for the linear trend model b. Calculate the MSE and MAD for the exponential trend model c. Which model that performs better
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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Siena Ltd attempts to find the trend of its sales over the past five years. Siena is considering which model that best represent the trends of its sales. Following are the result of linear and exponential model trend analysis:
a. Calculate the MSE and MAD for the linear trend model
b. Calculate the MSE and MAD for the exponential trend model
c. Which model that performs better

Transcribed Image Text:Exponential Trend
1.0426*
Variable
Linear Trend
Intercept
0.2751
(0.68)
0.85751*
(0.00)
0.0979*
t
(0.00)
(0.00)
Se
1.4282
0.0767
Notes: Parameter estimates are in the top part of the table with the p-
values in parentheses; * represents significance at the 5 percent level;
Se is used in the forecast for the exponential trend.
Linear trend
T
e?
Yt
3.01
e; = y; – ŷt
1.88
1
1.13
3.52
1.88
3.13
1.99
1.14
1.30
1.14
19
18.07
16.57
1.50
2.26
1.50
20
19.99
17.43
2.56
6.58
2.56
Total
36.72
22.06
Exponential trend
T
Yt
e?
et
-0.127
1
3.01
3.137
0.016
0.127
3.13
3.460
-0.330
0.109
0.330
19
18.07
18.276
-0.206
0.042
0.206
20
19.99
20.155
-0.165
0.027
0.165
Total
5.077
8.315
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