Table 3.

Seven Test Collections of Increasing Size

	No. of Relevant Documents	No. of Irrelevant Documents	Total
Test 1	50	50	100
Test 2	53	87	140
Test 3	105	141	246
Test 4	163	216	379
Test 5	216	216	432
Test 6	320	216	536
Test 7	381	216	597