Optimization of Sunflower Oil Transesterification Process Using Sodium Methoxide

Table 2

Trial and predicted values for response variables of the reduced model.

Treatment run	Blocks	Methyl esters content^a (𝑌, w/w%)
		Experimental value (𝑌0)	Predicted value (𝑌𝑖)	𝑌0−𝑌𝑖^b
1	2	96.46	96.64	−0.18
2	2	95.40	95.46	−0.06
3	2	97.32	97.61	−0.29
4	2	96.20	96.64	−0.44
5	2	99.20	99.21	−0.01
6	2	98.46	97.46	0.99
7	1	96.95	97.47	−0.52
8	1	98.14	98.08	0.05
9	1	97.00	96.49	0.51
10	1	99.20	98.23	0.96
11	1	96.80	97.47	−0.67
12	1	99.90	100.23	−0.33
13	3	96.64	96.99	−0.35
14	3	96.10	95.04	1.05
15	3	96.29	96.63	−0.34
16	3	96.99	97.31	−0.32
17	3	96.72	96.51	0.20
18	3	92.40	93.45	−1.05
19	3	93.54	93.57	−0.03
20	3	95.90	95.04	0.85
Opt. Point	—	99.70	100.04	−0.34

^aNo considerable differences (𝑃>0.05) between trial (𝑌₀) and predicted values (𝑌_𝑖);
^b𝑌₀−𝑌_𝑖: residual.