Posture Optimization Algorithm for Large Structure Assemblies Based on Skin Model

Table 3

(a) Wilcoxon rank sum test: Ranks of two methods

Method	N	Mean Rank	Sum of Ranks
Improved Method	20	10.50	210.00
Previous Method	20	30.50	610.00

(b) Wilcoxon rank sum test: Test statistics of two methods

Mann-Whitney U	Wilcoxon W	Z	Asymp. Sig. (2-tailed)	Exact Sig. [2(1-tailed Sig.)]
.000	210.000	-5.410	6.3018E-8	1.4509E-11