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. 285- Table of Fallout Ratios for a Generality, Number of 40.0 R- 5 *o 15 2o [OCRerr]5 30 35 40 45 5o P 0.5 4*.458 82.9*7 ho [OCRerr]o.6=5 41.25o 6*.875 82.5oo a.o 1o.2o8 =o.417 30.625 40.833 51.o4[OCRerr] 6i.25o 71.4S8 81.667 9,.875 3. o 6.736 13.47= 20.208 26.944 33.681 4o.417 47.1 53 53.889 60.625 67.361 4. o 5.000 1o.ooo 15.ooo ao.ooo =5.000 30.000 35.000 40.000 45.000 50.000 5. o 3.958 7-917 =[OCRerr].875 t5-833 *9-792 s3.75o =7.7o8 31.667 35.625 39.583 7-5 2*569 5.139 7.708 Io.[OCRerr]78 1[OCRerr].847 15.417 i7.986 30.556 a,.t=5 25°694 $o.o 1.875 3.750 5.625 7-5°0 9-375 11.25o '3-1a5 15-ooo 16.875 18.75o Is°5 1-458 2-9*7 4-375 5-833 7.192 8.75o Io.=o8 11.667 13o.25 14.583 15.0 1.181 =.361 3.542 4.722 5.903 7-083 8.=64 9-444 I0-6[OCRerr]5 11.8o6 =0° 0 O. 833 1.667 3.5o0 3 333 4- * 67 5- 000 S° 833 6-667 7- 5°0 8.333 [OCRerr]5.° o.6=5 *.25° z'875 2"500 3"'35 3-75o 4-375 5-°00 5.635 6.350 3o°o o° 486 0.972 *. 458 1°944 2.431 2.917 3- 403 3°889 4.375 4.86* 3.[OCRerr],0 0.387 0°774 1.161 1.548 1.935 2.331 2.708 3.095 3.482 3.869 40.0 0.3*a 0.625 0.937 1°250 1.56[OCRerr] 1.875 2.187 2°500 2.8iz 3.125 45.0 0.Z55 0.509 0.764 1.o'9 *.273 *.528 1.782 =°o37 =.292 3.546 $0°0 0.=08 0.417 o.625 0.833 1.o42 1°250 t.458 1.667 1.875 2.083 55.0 0.170 0.341 0.511 0.68= 0.85= 1.023 i.193 *.364 1.534 1*7o5 60.0 0.139 0.378 o.417 0.556 0°694 0.833 o°972 i.l*i 1.25o 1.389 65.0 O. 11[OCRerr] 0.22 4 0-337 O. 449 0"56* 0.673 O. 785 O-897 1.010 t .i22 70.0 0.089 0.i79 0.268 0.357 0.446 0.536 0.625 0.7,4 0.804 0.893 75.0 0.069 0.139 0.308 0.=78 0.347 0.417 0.486 0.556 0.625 O.694 80.0 0.05S 0.*04 0.156 0.=08 0.260 0.312 0.365 0.417 0.469 0.52* 85.0 0.037 0.074 0.1,0 0.*47 0.184 0.2[OCRerr]1 0.257 0.394 0.331 0.368 90.0 0.023 0.046 0.069 0.093 0.1*6 0.139 0.162 0°185 0.208 0.=31 9[OCRerr].0 0.011 O.O[OCRerr]S 0.033 0.044 0.055 0.066 0.077 0.088 0°099 0.II0 1 oo. o o, ooo o. ooo o °ooo o .ooo o .ooo o. ooo o. ooo o. ooo o. ooo o, ooo R" 55 P o°5 1.o [OCRerr].o 3.0 74.097 4. o 55.000 5,,0 43.54[OCRerr] 7-5 18-264 10.0 30,635 13.5 i6.o42 i5.o 13.986 3o. o 9- 167 s5. o 6.875 3o*o 5-347 35,0 4-356 4o, o 3,437 45. o =.8Ol [OCRerr]0.0 3*292 55,0 1.875 60.0 1.528 65.0 1.334 7o.o o.982 75,0 o,764 8o.o 0,573 85. o o. 404 9o, o 0.255 95,0 0.121 iOO,O 0°000 60 65 70 75 80 85 90 95 8o.833 87.569 94.306 60.000 65.000 7o.ooo 75.ooo 8o.ooo 85.000 90.000 95.ooo too.ooo 47.5°0 51.458 55.417 59.375 63.333 67-=93 71"25° 75.308 79"167 30.833 33.403 35.97= 38.5[OCRerr] 4..111 43.681 46.2 5o 48.859 5*.389 32.5°0 =4.375 36.250 38.*25 30.o0o 31.875 33.750 35-6[OCRerr]5 37-5°0 *7.500 18.958 30.417 2,.875 23.333 24.793 26.250 27.7o8 29.*67 14.167 15.347 16.528 17.7o8 18.889 20.069 31.250 22.431 23.611 io.ooo 1o.833 11.667 ,2.5oo 13.333 .4.167 15.ooo 15.833 16.667 7"5°° 8"125 8-75o 9-375 io.ooo 10e625 i1.25o 1*.875 12.5oo 5.833 6.319 6.8o6 7.192 7.778 8.a64 8.750 9.[OCRerr]36 9.722 4.643 5.030 5.417 5.804 6. i9o 6.577 6.964 7.351 7.738 3"75° 4.06= 4.375 4.687 5-ooo 5.31= 5-6=5 5.937 6.250 3.056 3.31o 3o565 3.819 4. o74 4.339 4.583 4.838 5.093 2"500 2.708 2.917 3.125 3.333 3.5[OCRerr] 3-75o 3-958 4"*67 3.o45 3.216 2.386 =-557 [OCRerr]-737 3"898 3.068 3.339 3.4o9 1.667 1.8o6 *.944 =-o83 [OCRerr].2=2 a.361 2.500 =.639 2.778 1.346 1.458 i.[OCRerr]71 1.683 1.795 1.9o7 2.el9 2.13. 2.244 1®071 *.i6, 1.350 [OCRerr]-339 1-429 1"518 I°6°7 1"696 1"786 0-833 o,9o3 O.971 1.0[OCRerr] 1.111 1.181 .1.35o 1-319 1.389 0.625 0.677 o.729 o.781 0.833 o.885 o.937 0.990 I.o o.441 0.478 o.5i5 o.551 0°588 o.625 o.661 0.699 0.735 °'278 0-30* 0-334 0.347 o.370 0-394 o-4*7 0.440 o,463 o.13[OCRerr] o.143 o.[OCRerr]54 o.164 o*[OCRerr]75 o.186 o.197 o.2o8 0.219 o°ooo o.ooo oeooo oeooo o.ooo ooooo o.ooo o.ooo o.ooo