SP500215 Appendix A: TREC-2 Results Appendix National Institute of Standards and Technology D. K. Harman [OCRerr]`11ts - GE Researeh and Development Center Summary Statistics j Run Number gecrd2-full, automatic 1 Recall-Precision Curve 1 L Num of Queries 50 J r Total number of documents over all queries 1 Retrieved: 50000 1 0.8 - Relevant: 10785 Rel[OCRerr]ret: 6080 0.6 ecall Level Averages Recall Precision 0.00 0.7047 0.10 0.4433 0.20 0.3753 0.30 0.3112 0.40 0.2503 0.50 0.2049 0.60 0.1496 0.70 0.0999 0.80 0.0690 0.90 0.0381 1.00 0.0088 [OCRerr]ge precision over all [OCRerr]nt docs nterpolated 0.2183 1 Document Level Averages Precision At 5 docs 0.4880 At 10 docs 0.4760 At 15 docs 0.4653 At 20 docs 0.4510 At 30 docs 0.4253 At 100 docs 0.3662 At 200 docs 0.2896 At 500 docs 0.1876 At 1000 docs 0.1216 R-Precision (precision after R docs retrieved (where R is the number of relevant docu- ments)) Exact 0.2816 Precision 0.4 0.2 0 1 0.8 0 0.2 0.4 0.6 0.8 Recall Fallout-Recall Curve I I I Level Averages NORMAL DEVIATE - Fallout-Recall Recall Recall D 0.3221 0.4269 0.4957 0.5489 0.5850 ) 0.5968 ) 0.6014 ) 0.6014 ) 0.6014 ) 0.6014 ) 0.6014 0.6 101 0.02 5 0.84 0.98 0 0.4 0.2 - 2 0.98 1 0.84 0 0.5 0 0 0.05 0.1 0.15 0.2 -1 0.16 Fallout x 100 -2 0.02 -3 -3 -2 -1 0 1 2 3 0.001