. 2020 Jul 21;8:e9578. doi: 10.7717/peerj.9578

Table 4. Tests of normality and selection of statistical methods for correlation analyses.

	Shapiro–Wilk
	Statistic	df	P value^a	Selected statistical methods
ATW	0.979	28	= 0.817
GRW	0.929	29	= 0.053	Pearson’s correlation analysis
MCW	0.883	28	= 0.005	Spearman’s correlation analysis
ATH	0.973	27	= 0.676
GRH	0.944	28	= 0.137	Pearson’s correlation analysis
MCH	0.882	27	= 0.005	Spearman’s correlation analysis
MSH	0.863	27	= 0.002	Spearman’s correlation analysis
RHW	0.838	29	<0.001
GRW	0.927	30	= 0.042	Spearman’s correlation analysis
MCW	0.874	29	= 0.003	Spearman’s correlation analysis
RHH	0.937	28	= 0.094
GRH	0.944	29	= 0.125	Pearson’s correlation analysis
MCH	0.874	28	= 0.003	Spearman’s correlation analysis
MSH	0.854	28	= 0.001	Spearman’s correlation analysis
AQIW	0.920	30	= 0.026
GRW	0.906	30	= 0.012	Spearman’s correlation analysis
MCW	0.866	30	= 0.001	Spearman’s correlation analysis
AQIH	0.969	28	= 0.551
GRH	0.936	29	= 0.080	Pearson’s correlation analysis
MCH	0.848	28	= 0.001	Spearman’s correlation analysis
MSH	0.824	28	<0.001	Spearman’s correlation analysis

Notes.

P > 0.05 was considered as normally distributed.

Abbreviations