Multiresponse Optimization for a Novel Compliant Z-Stage by a Hybridization of Response Surface Method and Whale Optimization Algorithm

Table 15

Friedman test for the displacement.

Characteristic	Quantity for assessments	Medium	Total of ranks
F1 via proposed algorithm	35	437.583	70
F1 via CSA	35	454.551	35
Total	70	446.067
DF	Chi-square	P-worth
1	35	≤0.001
Null hypothesis	H0: all treatment effects are zero
Substitute hypothesis	H1: not all treatment effects are zero