Table 4. Statistical significance of difference of means between groupings.

Metric	Attribute	Group I	Group J	Mean difference	Sig.	95% Confidence interval
						Lower bound	Upper bound
UnCap	Capacity Constraint	1	5	0.161	0.009	0.031	0.292
		5	8	−0.135	0.036	−0.264	−0.006
	Node Positioning	C	R	0.111	0.003	0.034	0.188
	Demand Distribution	1–10	SL	0.133	0.003	0.039	0.227
		1–100	SL	0.132	0.004	0.034	0.230
		Q	SL	0.128	0.004	0.033	0.223
RngMax	Time Constraint	3	5	−0.114	0.010	−0.208	−0.020
NoR	Time Constraint	1	6	−0.030	0.047	−0.059	0.000
		2	6	−0.017	0.027	−0.033	−0.002
		3	5	−0.017	0.046	−0.034	0.000
		3	6	−0.021	0.002	−0.035	−0.006
	Capacity Constraint	2	8	−0.014	0.010	−0.025	−0.003
		5	8	−0.029	0.036	−0.057	−0.002
	Depot Positioning	C	E	−0.012	0.030	−0.023	−0.001
	Node Positioning	C	R	0.012	0.016	0.002	0.023