SP500215 Appendix A: TREC-2 Results Appendix National Institute of Standards and Technology D. K. Harman [OCRerr]sults - University of California, Berkeley Summary Statistics Run Number N um of Queri 50 Total number Retrieved: 50000 Relevant: 10489 fRel~ret:7237I 1 0.8< 0.6 - Recall-Precision Curve KY ecall [OCRerr]vel Averages Recall Precision 0.00 0.8361 0.10 0.6331 0.20 0.5384 0.30 0.4781 0.40 0.4231 0.50 0.3611 0.60 0.2812 0.70 0.2400 0.80 0.1714 0.90 0.0928 1.00 0.0190 rage precision over all [OCRerr]ant docs -interpolated 0.3538 it Level Averages ut Recall 00 0.3969 20 0.4892 40 0.5489 160 0.5881 180 0.6227 .00 0.6458 L20 0.6690 140 0.6864 L60 0.7007 [80 0.7158 [OCRerr]0 0.1277 Document [OCRerr]vel Averages Precision At 5 docs 0.6600 At 10 docs 0.6360 At 15 docs 0.6160 At 20 docs 0.6040 At 30 docs 0.5753 At 100 docs 0.4608 At 200 docs 0.3650 At 500 docs 0.2310 At 1000 docs 0.1447 R-Precision (precision after R docs retrieved (where R is the number of relevant docu- ments)) Precision 0.4 0.2 0 1 0.8 0.6 Exact 0.3852 NORMAL DEVIATE - Fallout-Recall Recall 2 1 0.84 0 0.5 0 -1 0.16 -2 0.02 -3 0.84 0.98 0 0.4 0.2 0.98 3 -2 -1 0 1 2 3 0.001 0 `).2 0.4 0.6 0.8 Recall Fallout-Recall Curve 0 0.05 0.1 0.15 0.2 Fallout x 100