online_store_promo.dat

Obs	Promotion	Newsletter	Sales
1	1	1	10
2	1	1	9
3	1	1	10
4	1	1	8
5	1	1	9
6	1	0	8
7	1	0	9
8	1	0	7
9	1	0	7
10	1	0	6
1	2	1	8
2	2	1	8
3	2	1	7
4	2	1	9
5	2	1	6
6	2	0	4
7	2	0	5
8	2	0	5
9	2	0	6
10	2	0	4
1	3	1	5
2	3	1	7
3	3	1	6
4	3	1	4
5	3	1	5
6	3	0	2
7	3	0	3
8	3	0	2
9	3	0	1
10	3	0	2