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

Table 4

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

Source of variance	The average effect	Sum of square (SS)	Mean square (MS); (MS = SS/degree of freedom)	Magnitude effect,; (MSVariance/)
	0.185425	0.068765	0.068765	37.04831
	0.893125	1.595345	1.595345	859.5207
	2.370475	11.2383	11.2383	6054.839
Error		0.007424	0.001856
Total		12.90984