Experimental Investigation of the Influence of Cellulose Ether on the Floating of Rubber Particles in Mortar

Table 10

Variance analysis of the 28 d strength of the mortar.

Source of variation	Sum of squares	Degree of freedom	Mean square	Partial correlation	Specific value	Level of significance
X1	120.6639	1	120.6639	−0.8962	40.8106	0.0001
X2	331.3408	1	331.3408	−0.9582	112.065	0.0001
	30.6349	1	30.6349	0.7134	10.3612	0.0092
	8.6424	1	8.6424	0.4756	2.923	0.1181
X1X2	23.6196	1	23.6196	0.6664	7.9885	0.018
Regression	514.9016	5	102.9803	F2 = 34.82967		0.0005
Residue	29.5668	10	2.9567
Lack of fit	15.9437	3	5.3146	F1 = 2.73079		0.0998
Error	13.6232	7	1.9462
Sum	544.4684	15