Efficient Hybrid Method of FEA-Based RSM and PSO Algorithm for Multi-Objective Optimization Design for a Compliant Rotary Joint for Upper Limb Assistive Device

Table 15

Friedman Test for the mass.

Response	Number of tests	Median of difference	Sum of Ranks
Mass by AEDE	30	0.036847	66
Mass by the proposed hybrid method	30	0.036847	68
Mass by cuckoo	30	0.036544	46
Overall	90	0.036746
DF	Chi-Square	P-Value
2	9.87	0.007
Null hypothesis: H0: All treatment effects are zero
Alternative hypothesis H1: Not all treatment effects are zero