Obs	Tip	Hardness	Coupon
1	1	9.3	1
2	1	9.4	2
3	1	9.6	3
4	1	10	4
5	2	9.4	1
6	2	9.3	2
7	2	9.8	3
8	2	9.9	4
9	3	9.2	1
10	3	9.4	2
11	3	9.5	3
12	3	9.7	4
13	4	9.7	1
14	4	9.6	2
15	4	10	3
16	4	10.2	4