Table 7.

Analysis of Variance for Viscosity follow-up.

Terms	Coefficient	Level of significance
A	+7.23
B	+7.19
C	+11.56	0.2297
AB	−5.05	0.0604
AC	−8.72	0.7968
AD	−0.1819	0.0575
BC	−8.92	0.6711
BD	−0.3006	0.0031
CD	+3.23	0.6497
ABD	+1.56	0.7266
ACD	−1.22	0.2123
BCD	−4.61	0.1565
AD2	−1.89	0.2794
BD2	−1.38	0.4371
CD2	−0.9745	0.2650
ABD2	+6.22	0.1508
ACD2	+8.34	0.3634
BCD2	+5.00