Experience	Coded variables			Real variables
Experience	Temperature	Time	Concentration of ethanol	Temperature	Time	Concentration of ethanol
1	0	0	0	190	35	50
2	0	0	0	190	35	50
3	0	0	0	190	35	50
4	0	0	0	190	35	50
5	−1	−1	−1	190	20	30
6	1	−1	−1	210	20	30
7	−1	1	−1	170	50	30
8	1	1	−1	210	50	30
9	−1	−1	1	170	20	70
10	1	−1	1	210	20	70
11	−1	1	1	170	50	70
12	1	1	1	210	50	70
13	1.41	0	0	218.2	35	50
14	−1.41	0	0	161.8	35	50
15	0	1.41	0	161.8	56.15	50
16	0	−1.41	0	190	13.85	50
17	0	0	1.41	190	35	78.2
18	0	0	−1.41	190	35	21.8