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

Table 12

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/)
	44	3872	3872	1936
	−79	12482	12482	6241
	22	968	968	484
Error		8	2
Total		17330