Table 3. Correlation analysis of factors associated with quality scores.

Factors	Days online	Views	Likes	Score	Length	Average annual views
Days online	1
Views	0.320**	1
Likes	−0.20	0.397**	1
Score	0.186	0.152	0.255*	1
Length	−0.025	−0.109	0.065	0.137	1
Average annual views	0.083	0. 874**	0.483**	0.154	−0.116	1

*, correlation significant at the 0.05 level (2-tailed); **, correlation significant at the 0.01 level (2-tailed).