Prediction of the Normalized COVID-19 Epidemic Prevention Costs of Construction Projects Based on an Optimized Neural Network

Table 5

Error statistics of three methods (BP, BP neural networks optimized by GA, and the optimized neural network).

Data sequence number	Actual value	BP	Error (%)	BP neural networks optimized by GA	Error (%)	The optimized neural network	Error (%)
56	10	19.2718	92.72%	41.7735	317.74%	12.5919	25.92%
57	12	68.1481	467.90%	12.1349	1.12%	10.9385	8.85%
58	12	39.9396	232.83%	49.9298	316.08%	13.5302	12.75%
59	18	67.8152	276.75%	24.6317	36.84%	20.0691	11.50%
60	8	15.2674	90.84%	60.9559	661.95%	7.0119	12.35%
61	2	2.7418	37.09%	2.1691	8.45%	2.1496	7.48%
Average error		199.69%		223.70%		13.14%