Table 5.

Analysis of Variance for pH follow-up.

Terms	Coefficient	Level of Significance
A	+3.32
B	+3.40
C	+3.30	0.0164
AB	−0.2457	0.0012
AC	+0.3857	0.0001
AD	−0.1394	0.0243
BC	−0.2340	0.2414
BD	−0.0290	0.4120
CD	−0.0200	0.0027
ABC	+5.24	0.1875
ABD	+0.1619	0.0683
ACD	+0.2418	0.9771
BCD	+0.0034	0.0690
ABCD	−5.04