Question: Using the time series data in the table, respond to the following items. Period Sales 1 1001 2 1129 3 841 4 1044 5 1012

Using the time series data in the table, respond to the following items.

Period Sales
1 1001
2 1129
3 841
4 1044
5 1012
6 703
7 682
8 712
9 646
10 686
11 909
12 469
13 566
14 488
15 688
16 675
17 305
18 381

d-1.Compute all possible forecasts using a trend forecasting model using simple linear regression?(Round your answers to 2 decimal places.)

Period Sales Predicted Sales Absolute error
1 1,001 ? ?
2 1,129 ? ?
3 841 ? ?
4 1,044 ? ?
5 1,012 ? ?
6 703 ? ?
7 682 ? ?
8 712 ? ?
9 646 ? ?
10 686 ? ?
11 909 ? ?
12 469 ? ?
13 566 ? ?
14 488 ? ?
15 688 ? ?
16 675 ? ?
17 305 ? ?
18 381 ? ?

d-2.What is the MAD?(Round your answer to 2 decimal places.) MAD = ?

d-3.What is the trend equation based on the regression analysis?(Round your answers to 2 decimal places.)

Sales = ? - ? time period

e.What is the predicted annual change of industry sales?(Round your answer to 2 decimal places.)

Predicted annual change of industry sales = ?

f.Predict sales for the next three periods.(Round your answers to 2 decimal places.)

Predicted Sales
Sales (19) ?
Sales (20) ?
Sales (21) ?

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