Evolutionary Data Preprocessing to Alleviate Class Imbalance

Table 3

Class imbalance ratio for each class.

Classes		Original imbalance ratio (%)	Adjusted imbalance ratio (%)
1	Normal	690.59	2.81
2	Exploits	1.78	1.78
3	Reconnaissance	0.55	0.55
4	DoS	0.65	0.65
5	Generic	9.27	2.17
6	Shellcode	0.06	0.06
7	Fuzzers	0.96	0.96
8	Worms	0.01	0.01
9	Backdoor	0.09	0.09
10	Analysis	0.11	0.11
Standard deviation		217.93	1.00