Table 3.

A comparison of PRC and XPRC at five average precision (AP) levels determined by the PRC algorithm on the Genomics dataset. The cumulative article count is the number of articles with PRC AP below the given AP level. XPRC has better performance at all levels except for 1.0. p-value shows the significance of difference between PRC and XPRC at different AP levels.

Average precision levels		0.0	0.2	0.4	0.6	0.8	1.0
Cumulative article counts		58	231	420	687	1215	4234
PRC	MAP	0	0.09	0.198	0.324	0.504	0.858
	standard error	0	0.005	0.007	0.007	0.007	0.004
XPRC	MAP	0.274	0.417	0.493	0.555	0.633	0.827
	standard error	0.045	0.024	0.018	0.014	0.01	0.004
p-value		1e-07	8e-31	2e-45	2e-45	2e-25	1e-07