Using the TGT Quarterly Sales (Target Corp.) data: a. Fit a regression model with a time trend
Question:
Using the TGT Quarterly Sales (Target Corp.) data:
a. Fit a regression model with a time trend and seasonal dummy variables to the sales data.
b. Is the time trend coefficient statistically significant? How can you tell?
c. Are the seasonal dummy variables statistically significant? How can you tell?
Data from Target corp.
Target Corporation Quarterly Revenue and Net Income | ||||
Report Date | Fiscal Year | Fiscal Quarter | Revenue | Net Income |
4/30/2006 | 2006 | 1 | 12,863 | 554 |
7/31/2006 | 2006 | 2 | 13,347 | 609 |
10/31/2006 | 2006 | 3 | 13,570 | 506 |
1/31/2007 | 2006 | 4 | 19,710 | 1,119 |
4/30/2007 | 2007 | 1 | 14,041 | 651 |
7/31/2007 | 2007 | 2 | 14,620 | 686 |
10/31/2007 | 2007 | 3 | 14,835 | 483 |
1/31/2008 | 2007 | 4 | 19,871 | 1,028 |
4/30/2008 | 2008 | 1 | 14,802 | 602 |
7/31/2008 | 2008 | 2 | 15,472 | 634 |
10/31/2008 | 2008 | 3 | 15,114 | 369 |
1/31/2009 | 2008 | 4 | 19,560 | 609 |
4/30/2009 | 2009 | 1 | 14,833 | 522 |
7/31/2009 | 2009 | 2 | 15,067 | 594 |
10/31/2009 | 2009 | 3 | 15,276 | 436 |
1/31/2010 | 2009 | 4 | 20,181 | 936 |
4/30/2010 | 2010 | 1 | 15,593 | 671 |
7/31/2010 | 2010 | 2 | 15,532 | 679 |
10/31/2010 | 2010 | 3 | 15,605 | 535 |
1/31/2011 | 2010 | 4 | 20,661 | 1,035 |
4/30/2011 | 2011 | 1 | 15,935 | 689 |
7/31/2011 | 2011 | 2 | 16,240 | 704 |
10/31/2011 | 2011 | 3 | 16,402 | 555 |
1/31/2012 | 2011 | 4 | 21,288 | 981 |
4/30/2012 | 2012 | 1 | 16,867 | 697 |
7/31/2012 | 2012 | 2 | 16,779 | 704 |
10/31/2012 | 2012 | 3 | 16,929 | 637 |
1/31/2013 | 2012 | 4 | 22,726 | 961 |
4/30/2013 | 2013 | 1 | 16,706 | 498 |
7/31/2013 | 2013 | 2 | 17,117 | 611 |
10/31/2013 | 2013 | 3 | 17,258 | 341 |
1/31/2014 | 2013 | 4 | 21,515 | 520 |
4/30/2014 | 2014 | 1 | 17,050 | 418 |
7/31/2014 | 2014 | 2 | 17,406 | 234 |
10/31/2014 | 2014 | 3 | 17,732 | 352 |
1/31/2015 | 2014 | 4 | 21,751 | 960 |
4/30/2015 | 2015 | 1 | 17,119 | 651 |
7/31/2015 | 2015 | 2 | 17,427 | 773 |
10/31/2015 | 2015 | 3 | 17,613 | 476 |
1/31/2016 | 2015 | 4 | 21,626 | 1,421 |
4/30/2016 | 2016 | 1 | 16,196 | 614 |
7/31/2016 | 2016 | 2 | 16,169 | 625 |
10/31/2016 | 2016 | 3 | 16,441 | 608 |
1/31/2017 | 2016 | 4 | 20,690 | 821 |
4/30/2017 | 2017 | 1 | 16,017 | 677 |
7/31/2017 | 2017 | 2 | 16,429 | 671 |
10/31/2017 | 2017 | 3 | 16,667 | 478 |
1/31/2018 | 2017 | 4 | 22,766 | 1102 |
4/30/2018 | 2018 | 1 | 16,781 | 717 |
7/31/2018 | 2018 | 2 | 17,776 | 799 |
10/31/2018 | 2018 | 3 | 17,821 | 616 |
1/31/2019 | 2018 | 4 | 22,977 | 798 |
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