Table 13 Normalized S/N ratio, GRC and GRG.

Sample	Normalized S/N ratio (\({\text{Y}}_{\text{ij}}\))			Grey relational coefficient (\({\updelta }_{\text{ij}}\))			GRG (\({\upbeta }_{\text{ij}}\))	Rank
Sample	ρ	ɸ	HV	ρ	ɸ	HV	GRG (\({\upbeta }_{\text{ij}}\))	Rank
S₁	0.532	0.553	0	0.517	0.528	0.333	0.459	9
S₂	0.000	1.000	0.111	0.333	1.000	0.360	0.564	4
S₃	0.338	0.711	0.048	0.430	0.634	0.344	0.469	7
S4	0.420	0.622	1	0.463	0.570	1.000	0.677	1
S₅	0.803	0.272	0.181	0.718	0.407	0.379	0.501	6
S₆	0.516	0.542	0.158	0.508	0.522	0.373	0.468	8
S₇	1.000	0.000	0.299	1.000	0.333	0.416	0.583	3
S8	0.032	0.904	0.167	0.341	0.838	0.375	0.518	5
S₉	0.521	0.563	0.857	0.511	0.534	0.777	0.607	2

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