Back Propagation Neural Network Model for Predicting the Performance of Immobilized Cell Biofilters Handling Gas-Phase Hydrogen Sulphide and Ammonia

Table 2

Basic statistics of the test data set.

Variable	Basic statistics
	𝑁	Mean	Std deviation	Minimum	Maximum	Sum square
Inputs
Unit flow, per min	32	1.44	0.33	0.92	2.46	46.15
Concentration, ppmv	32	61	27.01	12	150	1952
Outputs
RE, %	32	94.32	7.31	66.8	100	3018.1