CRANV2 Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2 Appendix 3A appendix Cyril Cleverdon Michael Keen Cranfield An investigation supported by a grant to Aslib by the National Science Foundation. Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. - 266 - Table of Fallout Ratios for a Generality Number of 1.0 R" 5 so *5 2o =5 30 35 4o 45 50 p o. 5 o.996 1.992 2. 988 3.98 4 4.980 5.976 6[OCRerr] 972 7- 968 8.964 9*96o 1.o o. 495 o.991 1.486 ,o982 2.477 [OCRerr]-973 3- 468 3-964 4- 459 4-955 [OCRerr].o o.=45 o.49o 0.736 0.981 t.[OCRerr]36 1. 471 1.717 1.962 2.207 2. 452 3.c o.162 oe324 0.485 0.647 0.809 0.97* 1.133 *.[OCRerr]95 1.456 1.6[OCRerr]8 4.0 o. 12o o.[OCRerr] 4° o. 360 o. 480 o. 6oi o. 721 0.841 o. 961 1.o81 1.2oI 5.0 0.095 o.19o 0.285 0.380 0.475 o.571 o.656 o.761 0.856 o.951 7- 5 0.062 o.la 3 Oo i85 o.2 47 o. 309 o. 370 o. 432 o. 494 o. 556 o. 617 to.o 0.045 0-090 o-135 o.*8o o.225 o.[OCRerr]7o o.315 0.360 0.405 0.450 I[OCRerr].5 0.035 0.070 o.1o5 o.x4o o-175 o.21o 0.245 o.[OCRerr]8o o.315 0.35° 15. o 0.028 0.057 0.o85 o.*13 o.1 [OCRerr] o.17o o.199 Oo[OCRerr]27 0.255 0.284 20.0 0.020 0=040 0.060 0.080 0.100 0.120 0.140 0.160 0.180 0.200 [OCRerr]5.o OoOI5 0.030 0.045 0.060 o.o75 o.o9° o.1o5 o.12o o.135 o.15o 30.0 o.o12 0.023 0.035 0.047 0.058 0.o7o 0.082 0.093 OolO5 o.117 35°o 0.009 o.o19 0.028 0.037 0.046 0.055 0.055 0.074 0.°84 0-093 40.0 0.008 o.o15 o.o23 0.030 0.038 0.045 0.053 0.060 0.068 [OCRerr]-o75 45.0 0.006 o.o12 o.o*8 0.024 o.o31 0.037 0.043 0.049 0-055 o.o61 50.0 o.oo5 o. olo o.oi5 0.020 o.o[OCRerr]5 0.030 o°035 0.040 0.045 0-050 55=0 o,oo4 OOOO8 o.ola o°o16 0.020 0.025 o.o[OCRerr]9 0.033 0-037 o-o41 60.0 0.003 0.007 o.olo o.o13 o.o17 0.020 0.023 o.o27 0.030 [OCRerr] 0°033 65. o o°o03 o.oo5 0.008 o.o11 o.o13 o.ot6 o.o19 0.022 0°034 0.027 70.0 0t002 0.004 0.006 0.009 0.011 0.013 O.Oi5 0.017 0.019 O.O[OCRerr]t 75.0 0.002 0.003 o.oo5 0.007 0.008 o. olo o.o12 o=o13 o.ol5 o.o17 80.0 o.ool 0.003 0.004 o.oo[OCRerr] 0.006 0.008 0.009 O.OLO o.oll o.ol3 85°0 0.001 0.002 0.003 0.004 0.004 0.005 0.006 0.007 0.008 0.009 90cO 0*001 0°001 0.002 0.002 0.003 0°003 0=004 0.004 0.005 0.006 95.0 OeO00 0.001 0.001 0°001 0.001 OeO02 0.002 0e002 0.002 0.003 100.0 O.O00 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 R[OCRerr] 55 60 65 7o 75 8o 85 9° 95 *oo P 0-5 Io. 956 Ii-952 12-948 13-944 14.9[OCRerr] 15.936 i6.932 17.928 18.924 19.9[OCRerr]o 1°o 5.45° 5.946 6.441 6.937 7.432 7.928 8.423 8-919 9-4*4 9-91° 2.0 2.698 2,943 3.*88 3-433 3-679 3-924 4-169 4-414 4.660 4"9°5 3, o 1.78o 1.942 2,1o4 2.366 2, [OCRerr]7 2.5[OCRerr]9 [OCRerr].751 z.913 3.075 3,237 4.0 1.321 1.441 ,.562 t.682 1.8o2 1.922 3.o [OCRerr] 2.162 2.282 =.4o2 5.o 1,o46 1.141 1.236 1.331 1, [OCRerr] 6 1.522 I,617 1.712 1,8o7 1.9o2 7- 5 O. 679 0.7 41 0.802 0.864 o. 92 6 0.988 1.o 49 1.111 1. i73 1°235 iO. o O, 495 O. [OCRerr] 41 O. 566 0 = 631 O. 676 O° 72 * Oo 766 o. 811 o. 856 o, 9° * ia°5 0.385 o.[OCRerr]o o.455 o.49° o.526 o.561 o.596 o.631 o.666 o.7o1 15. o 0-3iS 0-34o 0.369 0.397 O. [OCRerr]5 O. 454 O. 482 0.511 o,539 0.567 2o.o o.=[OCRerr]o o.24o o.[OCRerr]6o 0.280 0.300 o. 3eo 0.34° 0.360 0.330 o. [OCRerr]o 25.0 0.165 o.18o o.195 o.2.o 0.225 o.24o 0.255 o,27o o.a85 o-3oo 3o.o o.[OCRerr]8 o.14o o.152 o.163 o.175 Oot87 o.199 o.21o o.222 o.234 35.0 o. 1o2 o. tt3 o.121 o.13o o-139 o. 149 o.158 0=167 o,177 o°186 40.0 0.083 o.o9o o.o98 o.1o5 o.*13 o.12o o.128 o. 135 o.143 o-15o 45°0 0.067 o,073 0.080 0.086 0,093 0.098 0,Io4 o.11o o.116 o,122 50°0 0.055 0.060 o.o65 o.07o 0.075 o.o8o o.o85 0.090 0.095 o.1oo 55.0 0.045 0.049 0.053 0.057 o.o61 0.066 0.070 0.074 0.078 0.082 6o°o o.o37 o°o4o 0.043 0.047 0.050 o.o53 o.o57 o.o6o o.o63 0.067 65.0 0.030 o.o3[OCRerr] 0.035 0.038 0.040 0.043 0.046 0.049 o.o51 o.054 7o.o o.o24 0.026 0.028 0.030 0.032 0.034 0.036 0.039 o-o41 0.043 75.0 o.o18 o.o[OCRerr]o 0.022 o.o[OCRerr]3 0.025 o.o27 o.o28 0.030 o.03[OCRerr] 0.033 80°0 0=01[OCRerr] 0.015 0.016 0.018 0.019 0.020 0.o21 0.023 0-024 0"025 85.0 o,olo o.o11 o.o11 o.o12 o.oi3 o.o14 o.o15 o.o16 0.017 0=018 90.0 0.006 0.007 0.007 0.008 0.008 OeO09 0°oo9 o.olo o.o11 0=o1. 95.0 0.003 0.003 0.003 0.004 0.004 0.004 0.004 0.005 0.005 0.005 10050 0°000 0*000 0.000 0.000 0.000 OeO00 0.000 0°000 0.000 0.000