SP500215 Appendix A: TREC-2 Results Appendix National Institute of Standards and Technology D. K. Harman suits - PRC, Inc. Summary Statistics Run Number prceo2-full, manual Recall-Precision Curve Num of Queries 50 1 L lotal number of documents over all queries Retrieved: 50000 0.8 Relevant: 10785 Rel[OCRerr]ret: 3561 F 0.6 [OCRerr]ecall Level_Averages Recall Precision 0.00 0.4768 0.10 0.2613 0.20 0.1807 0.30 0.1202 0.40 0.0875 0.50 0.0504 0.60 0.0328 0.70 0.0169 0.80 0.0142 0.90 0.0077 1.00 0.0031 age precision over all ant docs nterpolated 0.0904 Document Level Averages Precision At 5 docs 0.2120 At 10 docs 0.2480 At 15 docs 0.2707 At 20 docs 0.2760 At 30 docs 0.2753 At 100 docs 0.2418 At 200 docs 0.1756 At 500 docs 0.1086 At 1000 docs 0.0712 R-Precision (precision after R docs retrieved (where R is the number of relevant docu- ments)) Exact 0.1703 Precision 0.4 0.2 0 Level Averages NORMAL DEVIATE - [OCRerr]11out-Reca11 t Recall Recall 101 0.02 0.16 5 a84 0.98 0 0 0.1861 0 0.2402 0 0.2860 0 0.3141 0 0.3387 0 0.3564 0 0.3623 0 0.3623 0 0.3623 0 0.3623 0 0.3623 2 0.98 1 0.8 0.6 0.4 0.21 1 0.84 0 0.5 0 0 0.2 0.4 0.6 0.8 Recall Fallout-Recall Curve I I I I 0 0.05 0.1 0.15 0.2 -1 0.16 Fallout x 100 -2 0.02 -3 0.001 -3 -2 -1 0 1 2 3