Table 8.

Overall Averaged Performance Comparison of Pre-processing Methods.

Average performance	Pre-processing methods
	Wavelet	LPC-2-CC	SFX	SFX + FS
Accuracy %	52.67789	63.70274	72.72099	76.72044
Kappa Statistics	0.335301	0.490773	0.58568	0.643008
Precision	0.515225	0.652195	0.730832	0.771412
Recall	0.519617	0.638896	0.721978	0.763601
F-measure	0.496758	0.610196	0.701144	0.747919
ROC	0.717222	0.787528	0.836521	0.859025