Predictive Analytics and Software Defect Severity: A Systematic Review and Future Directions

Table 6

Data sampling approaches.

Data sampling	Frequency	Cited
Imbalanced	37	[L01], [L03], [L04], [L05], [L07], [L08], [L10], [L11], [L12], [L13], [L14],[L16],[L17],[L18], [L19], [L24], [L25], [L26], [L27], [L28], [L29], [L30], [L31], [L32], [L33], [L35], [L36], [L39], [L40], [L41], [L43], [L44], [L45], [L47], [L48], [L49], and [L50]
Resampled
Resampling approach
Oversampling	9	[L02], [L09], [L21], [L34], [L37], [L38], [L42], [L46], and [L51]
Undersampling	1	[L06]
Hybrid	2	[20] and [L22]
Others	2	[L15] and [L23]