Research on Prediction Method of Reasonable Cost Level of Transmission Line Project Based on PCA-LSSVM-KDE

Table 5

Cost intervals with different confidence levels.

Sample	Actual value	Point prediction value	Cost prediction interval
			80% confidence level		85% confidence level		90% confidence level		95% confidence level
1	4.34	4.13	3.60	4.53	3.56	4.58	3.50	4.71	3.41	4.87
2	4.90	4.44	3.87	4.87	3.83	4.93	3.76	5.06	3.67	5.23
3	5.01	5.24	4.57	5.76	4.52	5.82	4.44	5.98	4.34	6.18
4	5.04	4.65	4.06	5.11	4.01	5.17	3.94	5.31	3.85	5.49
5	5.08	5.49	4.78	6.02	4.73	6.09	4.65	6.25	4.54	6.47
6	5.10	4.59	4.01	5.04	3.96	5.10	3.89	5.24	3.80	5.42
⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮
70	12.84	13.52	11.79	14.84	11.65	15.01	11.45	15.41	11.18	15.94