SP500215 Appendix A: TREC-2 Results Appendix National Institute of Standards and Technology D. K. Harman results - The Environment Research Institute of Michi[OCRerr]an Summary Statistics Run Number erimrl-fulI, automatic Recall-Precision Curve Num of Queries 50 1 Total number of documents over all queries Retrieved: 41829 0.8 Relevant: 10489 Rel[OCRerr]ret: 4152 0.6[OCRerr] Recall Level_Averages Recall Precision 0.00 0.5948 0.10 0.3190 0.20 0.2334 0.30 0.1817 0.40 0.1280 0.50 0.0841 0.60 0.0441 0.70 0.0210 0.80 0.0115 0.90 0.0020 1.00 0.0020 erage precision over all evant docs n-interpolated 0.1219 [OCRerr]t Level Averages )ut Recall 000 0.1771 020 0.2227 040 0.2581 060 0.2834 080 0.3169 100 0.3383 120 0.3545 140 0.3794 160 0.3886 180 0.3995 [OCRerr]0 0.4104 Document Level Averages Precision At 5 docs 0.3720 At 10 docs 0.3580 At 15 docs 0.3347 At 20 docs 0.3340 At 30 docs 0.3113 At 100 docs 0.2304 At 200 docs 0.1802 At 500 docs 0.1203 At 1000 docs 0.0830 R-Precision (precision after docs retrieved (where R the number of relevant ments)) R Is docu- Exact 0.1814 Precision 0.4 0.2 0 1 0.8 0.6 NORMAL DEVIATE - Fallout-Recall p01 0.02 0.98 0 )[OCRerr]999 0.4 2 0.98 0.2 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 -3 -2 -1 0 1 2 3 Recall 0 0.2 0.4 0.6 0.8 Recall Fallout-Recall Curve I I