Coal and Gangue Underground Pneumatic Separation Effect Evaluation Influenced by Different Airflow Directions

Table 5

Variance analysis ( and are in the same direction).

Factor	Squariance	DOF	Mean square	value
	1.160	2	0.58	Distinctively
	1.411	2	0.705	Distinctively
	0.067	2	0.034	Distinctively
Regression	2.509	3	0.836	15.397
Error	0.272	5	0.054
Sum	2.781	8