Table 2.

Summary of data description

No	Item	Amount
1	The number of attributes/features:
	a) Before preprocessing b) After preprocessing	89 62
2	Number of samples	140
3	The number of instances/data points:
	a) Before preprocessing b) After preprocessing (including missing values)	12,460 8,680
4	Missing values (after removing features that contain ≥ 50% missing values)	670

Refer to Appendix B for the percentage of missing values in each feature