SP500207 Appendix A: TREC-1 Results appendix National Institute of Standards and Technology Donna K. Harman ults - PRC, Inc. Summary Statistics J Run number prceol- 1 Recall-Precision Curve Num[OCRerr]queries 50 j 1 Total number of documents over all queries Retrieved 100001 0.8 - Relevant 4056 Rel[OCRerr]ret 1666 J 0.6 ecall Level Averages Document Level Averages Precision Lll Precision Recall Precision 0.4 0.6598 at 5 docs 0.0379 0.4040 ) 0.4382 at 15 docs 0.1193 0.3653 ) 0.3451 at 30 docs 0.1714 0.3033 0.2 ) 0.2536 at 100 docs 0.3438 0.2322 0.1753 at 200 docs 0.4557 0.1666 0 0.1400 0.1016 ROC Averages 0.0489 False Alarm Detection 0.0185 0.00000 0.0388 0.0015 0.00001 0.0534 0.0015 0.00002 0.0582 0.00003 0.0690 eprecision for all points 1 0.00004 0.0753 [OCRerr]vg 0.1985 0.00005 0.0943 ;e precision for 3 0.00006 0.0901 [OCRerr]diate points 0.00007 0.1012 0.00008 0.1033 1 0.00009 0.1143 [OCRerr].50, 0.80) vg 0.1679 0 0.2 0.4 0.6 0.8 Recall NORMAL DEVIATE - Detection-False Alarm 0 Ol 0.02 0.16 3 2 1 0 -1 -2 -3 C 0.5 0.84 0.98 0 -3 -2 -1 0 1 2 3