Table 1.

The optimal parameter set for each specimen, the associated RMS errors and R² values, along with the statistical summary for all seven specimen and the optimal parameter set that represents the average response

	β	a1	a2	a4	RMS error	R2
Specimen 1	2.39	52.3	34.5	16.2	0.61	0.91
Specimen 2	2.55	23.7	29.3	7.80	0.64	0.94
Specimen 3	2.62	33.1	18.9	7.60	0.54	0.97
Specimen 4	2.55	23.2	25.8	10.6	0.96	0.95
Specimen 5	2.09	16.3	16.5	6.60	1.00	0.91
Specimen 6	2.24	116.9	13.0	6.54	1.01	0.91
Specimen 7	1.85	20.1	12.8	7.85	1.13	0.91
Mean ± SEM	2.33 ± 0.11	40.8 ± 13.5	21.5 ± 3.2	9.03 ± 1.3	0.84 ± 0.09	0.93 ± 0.01
Average response	2.25	33.7	23.2	9.82

While a representative response cannot be obtained by averaging individual parameter values, the average and associated standard error of the mean of each parameter are provided to demonstrate the consistency of identified parameters across all specimens.