Using the time series data in the table, respond to the following items. Period Sales 1 $ 615 2 676 3 761 4 710 5 784 6 801 7 852 8 698 9 1,193 10 1,115 11 1,231 12 1,259 13 1,495 14 1,229 15 1,652 16 1,337 17 1,673 18 1,613
Using the time series data in the table, respond to the following items. Period Sales 1 $ 615 2 676 3 761 4 710 5 784 6 801 7 852 8 698 9 1,193 10 1,115 11 1,231 12 1,259 13 1,495 14 1,229 15 1,652 16 1,337 17 1,673 18 1,613
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
Using the time series data in the table, respond to the following items.
| Period | Sales | ||
| 1 | $ | 615 | |
| 2 | 676 | ||
| 3 | 761 | ||
| 4 | 710 | ||
| 5 | 784 | ||
| 6 | 801 | ||
| 7 | 852 | ||
| 8 | 698 | ||
| 9 | 1,193 | ||
| 10 | 1,115 | ||
| 11 | 1,231 | ||
| 12 | 1,259 | ||
| 13 | 1,495 | ||
| 14 | 1,229 | ||
| 15 | 1,652 | ||
| 16 | 1,337 | ||
| 17 | 1,673 | ||
| 18 | 1,613 | ||
Please show work, thanks.
Transcribed Image Text:e. What is the predicted annual change of industry sales? (Round your answer to 3 decimal places.)
Predicted annual change of industry sales
f. Predict sales for the next three periods. (Round your answers to 3 decimal places.)
Predicted sales
Sales (19)
Sales (20)
Sales (21)
Transcribed Image Text:d-1. Compute all possible forecasts using a trend forecasting model using simple linear regression? (Round your answers to 3 decimal
places.)
Predicted
Sales
Period
Sales
Absolute Error
615
2
676
3
761
4
710
784
6
801
7
852
8
698
1,193
10
1,115
11
1,231
12
1,259
13
1,495
14
1,229
15
1,652
16
1,337
17
1,673
18
1,613
d-2. What is the MAD? (Round your answer to 3 decimal places.)
MAD
d-3. What is the trend equation based on the regression analysis? (Round your answers to 3 decimal places.)
Sales
%3D
time period.
+
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