Mathematical Analysis of the Effect of Iron and Silica on the Reduction Performance of Manganese Ores

Table 3

Effect of total iron (), silica (), and their interaction () on RDI_+3.15.

Source of variance	The average effect	Sum of square (SS)	Mean square (MS); (MS = SS/degree of freedom)	Magnitude effect,; (MSVariance/)
	1.765325	6.232745	6.232745	17.63527
	4.867275	47.38073	47.38073	134.0617
	−6.47918	83.95942	83.95942	237.5594
Error		1.4137	0.353425
Total		138.9866