Table 2.

ANOVA statistics obtained from model training and testing data sets

Property	Source of variation	Sum of squares	DFa	MSEb	RMSEc	CF ratiod
Average PS (nm)	Model	41,682,100	25	1,667,284.00	1,291.23	3.28
	Error	2,543,100	5	508,620.00	713.18
	Total	44,225,200	30
	Covariance term	Sum of errors
	526,462	13.7687
	Train set R2	94.02%
	Test set R2	93.40%
Average PDI	Model	913.71	25	36.54	6.04	2.63
	Error	69.5449	5	13.91	3.73
	Total	962.321	30
	Covariance term	Sum of errors
	−20.9333	−7.04133
	Train set R2	92.77%
	Test set R2	90.44%
Average ZP (mV)	Model	968.07	25	38.72	6.22	12.89
	Error	15.02	5	3.00	1.73
	Total	996.29	30
	Covariance term	Sum of errors
	13.198	−0.181534
	Train set R2	98.49%
	Test set R2	82.28%

Notes:

^aDegrees of freedom;

^bmean sum of squared errors;

^croot mean-squared error;

^dcomputed F ratio.

Abbreviations: ANOVA, analysis of variance; PDI, polydispersity index; PS, particle size; ZP, zeta potential.