SP500215 NIST Special Publication 500-215: The Second Text REtrieval Conference (TREC-2) Combination of Multiple Searches chapter E. Fox J. Shaw National Institute of Standards and Technology D. K. Harman Table 12: Per-Topic comparison of Average Precisions (Ad-hoc Topics 101-150). Topic I #Rel'1 SV J LV [OCRerr] Pnl.O J Pnl.5 [OCRerr] Pn2.O I'_CombSUM I' Chg/Max] Chg/Pn2.O 1 103 94 0.2400 0.2379 0.0130 0.0225 0.0309 0.0532 -77.83% 72.17% 122 114 0.1467 0.1059 0.0547 0.0490 0.0544 0.0898 -38.79% 65.07% 101 57 0.2232 0.1932 0.0900 0.1088 0.1175 0.1482 -33.60% 26.13% 140 25 0.0150 0.0520 0.0111 0.0207 0.0315 0.0356 -31.54% 13.02% 135 400 0.4072 0.4449 0.1103 0.1121 0.0835 0.3122 -29.83% 273.89% 104 75 0.1867 0.2214 0.0715 0.0642 0.0828 0.1671 -24.53% 101.81% 121 55 0.0017 0.0028 0.0283 0.0542 0.0628 0.0475 -24.36% -24.36% 127 223 0.2411 0.2476 0.0543 0.0942 0.1028 0.1911 -22.82% 85.89% 143 397 0.4069 0.3978 0.1628 0.1968 0.2022 0.3257 -19.96% 61.08% 124 173 0.0201 0.0165 0.1711 0.1360 0.1068 0.1501 -12.27% 40.54% 146 358 0.6795 0.7017 0.4394 0.4775 0.4907 0.6255 -10.86% 27.47% 114 138 0.0518 0.0756 0.2381 0.2559 0.2615 0.2525 -3.44% -3.44% 112 291 0.0041 0.0188 0.3876 0.3515 0.3194 0.3779 -2.50% 18.32% 130 286 0.2301 0.2937 0.4184 0.5477 0.5749 0.5632 -2.04% -2.04% 102 64 0.2127 0.2308 0.1119 0.1373 0.1505 0.2287 -0.91% 51.96% 128 381 0.0915 0.0751 0.2583 0.3710 0.4190 0.4156 -0.81% -0.81% 150 458 0.4618 0.4994 0.3362 0.4432 0.4566 0.4985 -0.18% 9.18% 115 165 0.4053 0.4383 0.3262 0.3633 0.3720 0.4407 0.55% 18.47% 113 206 0.0531 0.0768 0.2700 0.3304 0.3030 0.3367 1.91% 11.12% 119 326 0.0644 0.0843 0.2442 0.2252 0.2018 0.2497 2.25% 23.74% 107 98 0.1101 0.1580 0.3156 0.4062 0.4451 0.4592 3.17% 3.17% 116 49 0.2635 0.1886 0.3008 0.2803 0.2487 0.3125 3.89% 25.65% 118 273 0.0259 0.0164 0.1551 0.1736 0.1725 0.1806 4.03% 4.70% 145 162 0.3218 0.2983 0.2169 0.2180 0.1961 0.3359 4.38% 71.29% 138 52 0.0895 0.0992 0.1169 0.1321 0.1322 0.1386 4.84% 4.84% 148 250 0.7256 0.7300 0.7316 0.7904 0.8010 0.8416 5.07% 5.07% 108 294 0.0994 0.1266 0.3089 0.2586 0.1820 0.3264 5.67% 79.34% 136 206 0.1713 0.1976 0.3943 0.5899 0.5894 0.6319 7.12% 7.21% 134 188 0.4033 0.4132 0.5091 0.4897 0.4675 0.5500 8.03% 17.65% 132 201 0.1979 0.3246 0.5671 0.5759 0.5625 0.6222 8.04% 10.61% 133 80 0.2396 0.2793 0.1541 0.2322 0.2425 0.3034 8.63% 25.11% 147 315 0.1371 0.1266 0.2312 0.2820 0.3001 0.3317 10.53% 10.53% 106 201 0.0354 0.0458 0.2784 0.3463 0.3653 0.4039 10.57% 10.57% 126 240 0.2766 0.2990 0.1997 0.3132 0.3548 0.3971 11.92% 11.92% 125 169 0.1632 0.1719 0.2580 0.2224 0.1842 0.2920 13.18% 58.52% 137 158 0.3365 0.4135 0.2339 0.3128 0.3555 0.4715 14.03% 32.63% 131 28 0.0659 0.0648 0.0671 0.0984 0.1061 0.1255 18.28% 18.28% 110 496 0.4909 0.4968 0.4845 0.4768 0.4336 0.6001 20.79% 38.40% 142 660 0.4269 0.4479 0.4060 0.4694 0.4629 0.5721 21.88% 23.59% 117 275 0.1165 0.1030 0.1296 0.1596 0.1637 0.2007 22.60% 22.60% 149 133 0.0309 0.0836 0.0490 0.0732 0.0769 0.1028 22.97% 33.68% 129 207 0.3391 0.2338 0.2402 0.3348 0.3477 0.4369 25.65% 25.65% 144 49 0.2490 0.2275 0.0832 0.1327 0.1958 0.3130 25.70% 59.86% 105 54 0.0656 0.1744 0.1304 0.1439 0.1441 0.2262 29.70% 56.97% 139 55 0.0911 0.1139 0.0592 0.0705 0.0776 0.1481 30.03% 90.85% 111 285 0.3795 0.3540 0.1991 0.3025 0.3756 0.5025 32.41% 33.79% 123 435 0.0697 0.0800 0.2254 0.2252 0.2043 0.3014 33.72% 47.53% 120 83 0.0165 0.0136 0.0490 0.0556 0.0538 0.0746 34.17% 38.66% 109 742 0.0875 0.0879 0.0811 0.1344 0.1500 0.2290 52.67% 52.67% 141 36 0.0084 0.0125 0.0538 0.0517 0.0514 0.0873 62.27% 69.84% [OCRerr] Avg [OCRerr] 10760 [[ 0.2035 [OCRerr] 0.2159 [OCRerr] 0.2205 ] 0.2543 [OCRerr] 0.2573 II 0.3206 [1 24.60% [OCRerr] 24.60% [OCRerr] 252