Factor Level 1 Level2 Level 3 level 4 Lmax-Lmin
A. Time (min) 28.38 28.20 28.91 27.69 1.22
B. Temperature (°C) 26.74 27.57 28.34 30.53 3.79
C. Agitation speed (rpm)       29.54 28.07 28.21 27.36 2.17
D.Coagulant concentration (wt%) 29.44 29.64 27.59 26.51 3.13
E.  Latex to coagulant volume ratio  25.08 27.17 29.31 31.61 6.53
Table 3: Average of the S/N ratios for each level of the factors.