SP500207 Appendix A: TREC-1 Results appendix National Institute of Standards and Technology Donna K. Harman ults - GTE Laboratories number f Num[OCRerr]queries50j 1 Total number of documents over all queries Retrieved 10000 0.8 - Relevant 4056 t Rel[OCRerr]et 1561 0.6 ecall Level Averages Document Level Averages Precision Precision Recall Precision 0.4 0.6492 at 5 docs 0.0769 0.4040 0.4468 at 15 docs 0.1282 0.3387 0.3278 at 30 docs 0.1764 0.2887 0.2 0.2484 at 100 docs 0.3653 0.2252 0.1916 at 200 docs 0.4633 0.1561 0 0.1455 0.1159 ROC Averages 0.0963 False Alarm Detection 0.0474 0.00000 0.0472 0.0166 0.00001 0.0570 0.0055 0.00002 0.0821 0.00003 0.1110 for all points 0.00004 0.1185 vg~~83 0.00005 0.1454 precision 0.00006 0.1332 diate points 0.00007 0.1446 0.00008 0.1704 ig[OCRerr]0.[OCRerr] 0.00009 0.1598 Recall-Precision Curve 0 0.2 0.4 0.6 0.8 Recall NORMAL DEVIATE - Detection-False Alarm 0.001 0.02 0.16 0.5 0.54 0.98 0.9[OCRerr] 3 2 1 0 -1 ½<½ -2 -3 ½w< II -3 -2 -1 0 1 2 3 C C 0