Table 2. Comparison of the four models with respect to prediction accuracy (in percentages).

	Coverage rate of the 95% prediction intervals	Avg. coverage rate of the 95% prediction intervals(cross-validation)	Range of coverage rate of the 95% prediction intervals(cross-validation)	Coverage rate of the ±30% observation intervals	Avg. coverage rate of the ±30% observation intervals(cross-validation)	Range of coverage rate of the ±30% observation intervals(cross-validation)	Successful prediction rate	Avg successful prediction rate(cross-validation)	Range of successful prediction rate(cross-validation)
Model 1	6.39	6.73	[5.89,7.56]	29.82	29.76	[21.94,31.84]	68.42	68.33	[66.49,69.52]
Model 2	4.80	4.79	[0.27,10.33]	31.48	30.63	[29.62,31.82]	69.16	68.80	[67.44,70.34]
Model 3	23.16	24.16	[22.42,25.27]	33.09	33.38	[29.94,42.29]	70.04	69.43	[68.25,70.92]
Model 4	52.11	49.86	[46.97,51.63]	47.79	31.17	[30.52,33.2]	79.72	70.41	[69.97,72.71]