A county has been battling COVID for the last few months. The accompanying data file includes the
Question:
A county has been battling COVID for the last few months. The accompanying data file includes the daily number of new COVID cases in this county for six weeks. It is known that the number of COVID cases recorded over the weekend, which includes Saturday and Sunday, are lower than they are on weekdays. Estimate a linear trend model along with a weekend dummy variable and forecast the number of COVID cases for Monday and Saturday of week 7.
| Week | Day | Cases |
| 1 | Monday | 870 |
| 1 | Tuesday | 872 |
| 1 | Wednesday | 747 |
| 1 | Thursday | 682 |
| 1 | Friday | 709 |
| 1 | Saturday | 606 |
| 1 | Sunday | 520 |
| 2 | Monday | 690 |
| 2 | Tuesday | 754 |
| 2 | Wednesday | 707 |
| 2 | Thursday | 684 |
| 2 | Friday | 630 |
| 2 | Saturday | 419 |
| 2 | Sunday | 450 |
| 3 | Monday | 667 |
| 3 | Tuesday | 680 |
| 3 | Wednesday | 719 |
| 3 | Thursday | 674 |
| 3 | Friday | 442 |
| 3 | Saturday | 375 |
| 3 | Sunday | 386 |
| 4 | Monday | 629 |
| 4 | Tuesday | 616 |
| 4 | Wednesday | 620 |
| 4 | Thursday | 643 |
| 4 | Friday | 722 |
| 4 | Saturday | 427 |
| 4 | Sunday | 599 |
| 5 | Monday | 620 |
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