[Retracted] Multiobjective Optimization of Mechanical Properties on Sisal-Glass Fiber-Reinforced Hybrid Composites Using Response Surface Methodology and LINGO Analysis

Table 1

Factors and level of experiments.

Factors	Unit	Notation	Factor level
			−1	0	+1
Vol.% of sisal fiber	Vol.%	X1	10	15	20
Vol.% of epoxy resin	Vol.%	X2	20	25	30