Table 7. Standard error and confidence interval for citation rates by access type.

Citations for each type of access, showing mean, median, standard deviation, standard errorand confidence interval for 95% confidence level.

	Count	Mean citations	Median citations	Standard deviation	Standard error	Confidence interval (95%)
Bronze	1089	5.16	2	11.27	0.34	4.49, 5.83
Closed	7049	4.53	2	9.51	0.11	4.31, 4.75
Diamond	265	1.79	1	3.57	0.22	1.36, 2.22
Gold	1706	5.14	3	7.75	0.19	4.77, 5.5
Green	1256	7.54	3	26.23	0.74	6.09, 8.99
Hybrid	628	7.50	3	15.53	0.62	6.29, 8.72