Table 2.

Result of the analysis of variation.

Source	Sum of Squares	df	Mean Square	F-Value	p-Value
Model	1314.82	10	131.48	13.77	<0.0001	significant
A—HPC	1008.40	5	201.68	21.12	<0.0001
B—Grinding time	266.59	4	66.65	6.98	0.0002
C—Presence of SDS	39.84	1	39.84	4.17	0.0465

df, Degrees of freedom; HPC, Hydroxypropyl cellulose; SDS, Sodium dodecyl sulfate.