Table 4.

Statistical indicator of the dataset.

	Parameters	Symbol	Units	Min	Max	Mean	STD	Kurtosis	Skewness
Input	Compressive strength of composite	Cfc	MPa	40.20	66.50	53.08	11.89	−1.99	0.017
	Flexural load	P	kN	1.31	3.21	2.58	0.75	−0.72	−1.06
	Density	ρ	kg/m	1946.1	2385.03	2068.62	73.24	3.21	1.24
	First crack strength	N1	blows	2	37	14.96	9.57	−1.04	0.29
Output	Failure strength	N2	blows	5	46	19.75	10.74	−1.03	0.15