Question: Use the model developed in Example 1.5 to predict the total sales for weeks 2 through 16, and compare the results to the observed sales.

Use the model developed in Example 1.5 to predict the total sales for weeks 2 through 16, and compare the results to the observed sales. Does the accuracy of the model seem to be different when coupons are used or not? When advertising is used or not?

Example 1.5 Week Price ($) Coupon Advertisin (0,1) 9 () 1 0 2 3 4 6.99 6.99 6.99 6.99 6.49 6.49 6.49 6.49 7.59 7.59 0 0 1 1 0 0 1 5 6 7 8 9 10 11 12 13 Store 1 Sales (Units) 501 772 554 838 521 723 510 818 479 825 533 839 484 686 543 767 Store 2 Sales (Units) 510 748 528 785 519 790 556 773 491 822 513 791 480 683 531 743 150 0 150 0 150 0 150 0 150 0 150 0 150 0 150 1 Store 3 Sales (Units) 481 775 506 834 500 723 520 800 486 757 540 832 508 708 530 779 0 0 7.59 1 1 14 15 7.59 5.49 5.49 5.49 5.49 0 0 1 16 1

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