Service Risk Evaluation of the General Contract for Coal Mine Production and Operation: Case Study at Shendong Jinjie Coal Mine in China

Table 10

Confidence intervals.

Confidence interval			down	up
First-level factor			7.46	8.47
			6.73	7.35
			6.80	7.35
			8.49	8.82
			7.62	8.96
			7.09	8.33
			6.67	7.69
Secondary factor			6.95	7.61
			7.09	8.04
			7.19	8.00
			6.88	7.91
			7.25	8.10
			7.25	8.10
			6.88	7.91
			7.48	8.52
			7.59	8.44
			7.59	8.59
			6.57	7.69
			7.12	8.12
			7.58	8.96
			7.40	8.20
			7.94	9.06
			7.46	8.85
			7.46	8.27
			7.82	9.08
			6.97	7.86
			6.49	7.51
			7.11	8.09