SP500215 Appendix A: TREC-2 Results Appendix National Institute of Standards and Technology D. K. Harman resjilts - GE Research and Development Center [ Summary Statistics ] [ Run Number gecrdl-full1 manual 1 Recall-Precision Curve 1 Num of Queries 50 Total number of documents over all queries Retrieved: 44004 0.8 Relevant: 10489 Rel[OCRerr]ret: 6118 [OCRerr]ecall Level_Averages Recall Precision 0.00 0.8112 0.10 0.6131 0.20 0.5320 0.30 0.4518 0.40 0.3988 0.50 0.3305 0.60 0.2198 0.10 0.2196 0.80 0.1393 0.90 0.0868 1.00 0.0130 age precision over all 1 ant docs J interpolated 0.3308 ] Level Averages t Recall 0 0.3899 0 0.4141 0 0.5113 0 0.5400 0 0.5625 0 0.5186 0 0.5932 0 0.6086 0 0.6220 0 0.6291 0 0.6381 0.6 Document Level Averages Precision Precision 0.4 At 5 docs 0.6080 At 10 docs 0.6060 At 15 docs 0.5821 0.2 At 20 docs 0.5660 At 30 docs 0.5440 0 At 100 docs 0.4528 At 200 docs 0.3364 At 500 docs 0.2045 At 1000 docs 0.1236 R-Precision (precision after R 1 docs retrieved (where R is 0 0.2 0.4 0.6 0.8 Recall Fallout-Recall Curve II>¼½ the number of relevant docu- ments)) 0.8 Exact 0.3812 0.6 NORMAL DEVIATE - Fallout-Recall )01 5 0.84 o.gs [OCRerr][OCRerr]999 0.4< 2 0.98 0.2 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 0.001 Recall -3 -2 -1 0 1 2 3