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.
- 279 -
['able of Fallout Ratios for a Generality Number of 20.0
:-,. 5 zo z 5 "[OCRerr]0 a5
P
o.S 20.306 4o.61 a* 6Oo918 81.234
z.o zo.xoa ,,o.2o4 30.306 40.408 $o.$zo
2.0 5 -000 ][0 *000 ][ 5.000 20 *000 [OCRerr] 5.000
3,0 3-[OCRerr]99 6-599 9-898 Z3*;97 , z6*497
4-0 [OCRerr]'* 449 4"898 7*347 9-796 12-[OCRerr]45
5*o X*939 3*878 5*8z6 7.755 9-694
7',5 1"259 2.517. 3.776 5*034 6*293
Zo,o o*918 z*837 . 2,755 3-673 4,59a
12,5 o,7.I4 z*409 2*x43 a,857 . 3 * 57]r,
15*o 0*578 1,I56 z-735 a.313 3,892
so.o 0.408 o,816 z,2:t4 1,633 2,o41
35-o o ,306 o 61 a o *918 I ,aa 4 z 53 x
3o,o 0.238 0,476 0.724 o,950 z,xgo
35,o o,19o 0,379 0*569 0,758 0*948
40,0 o,z53 0,306 0.459 0,6ta o,765
45,o o,za[OCRerr] 0,249 o,374 0,499 0,624
50,0 o.zo2 o,[OCRerr]o4 0.306 0,408 o,$zo
$5,o 0,083 o,167 . o,aso 0,334 0*4|7
6o,o 0,068 o.236 0,204 0,072 o,34o
65.o 0.055 o.zzo o.z65 o.',2o o.275
7o,o 0-044 0,087 . o.z3z o,275 o.,[OCRerr]29
75"o o,o34 o,o68 o. 1o3 o,I 36 o, I7Q
8o.o 0,026 o,o52 0.077 o.1o3 o.128
85.o o.oz8 0,036 o,o54 0,o70 o*o9o
90,0 o.o'z o*o03 0,034 o*o45 0*057
95.o 0.oo5 o .oz l o .o I6 o .o$ Z 0 *o07
[OCRerr]00.0 0.000 0 *000 0.000 0.000 0 *000
30 35 40 45 5o
6o,612 70.714 8o,826 9o,918
3o*ooo 35-ooo 4o.ooo 45.000
19*796 33*095 06*395 39*694
14*694 I7,143 I9-592 20*o4z
zz*633 13*571 15*5x0 z7.449
7,55z 8.81o zo.o68 zz.3a7
5*52o 6,439 7,347 8*065
4.386 5.ooo 5-714 6,409
3*469 4*048 4,626 5,2o4
2,449 a*857. 3-265 3.673
z,837. 2*143 3-449 3-755
1-439 1*667. 1,9o5 2,143
1,I37. 1*337. Z*526 1*706
°"918 Z*°TZ Z'034 ;,378
o-748 o-873 0*998 1,130
o,612 o.7I4 0,826 o.918
o,5o1 o,584 o,668 o,752
0,408 0,476 o,544 o,612
0.330 o.385 o-44o o,495
o.260 o,3o6 0,350 0.394
o,ao4 o.338 o,073 0,306
o,z53 o,I79 o,2o4 o,23o
o.zo8 o,za6 o,I44 o,162
o,o68 0,079 o,o9i o,1o3
0,033 0,038 0,043 0,048
0*000 0*000 0.000 0.000
50.000
32-993
24.49o
z9.388
13.585
9.284
7.143
5,780
4.082
3,o6I
a,38I
z.895
z*531
I *a47
I *020
0.835
0.680
0,549
0,437
o,34o
o,255
0.I80
O*II3
0-054
OJO00
i i!,
[OCRerr]" 55 60 65
P
0*5
l,o
55,000 6o.ooo 65,000
3,o 36-393 39,593 43,892
4. o 26.939 09.388 31-837
$,o az,3a7. 33,065 as,aa4
7[OCRerr]5 I3-844 zS,zoa 16,362
ZO.O I0,102 Z1*030 1[,939
aa-5 7,857. 8.57: 9.286
15*o 6*361 6,939 7,517
[OCRerr]o.o 4,49° 4,898 5.306
aS*o 3.367. 3.673 3.980
3o.o 3-6z9 2,857. 3,o95
35,o a*oSs 3-374 a*464
40.0 z*684 1.837 1.99o
45,o I*370 1,497. z,6az
5o.o z,z2= z,224 z.3[OCRerr]7
55,0 0.918 X*OOa 1,085
6o.o o.748 o.816 0.884
65,o 0,604 o,659 o*7x4
7o-o o*48z o*505 o,569
75-o 0-374 0*408 o*440
80.0 o.28x 0.306 o.332
85.o o.z98 o,2;6 o,034
90.0 0,z35 0,136 o.247
95.0 o*o59 0*064 0,070
IO0*O 0.000 0*000 0*000
70 75 80 85 9° 95
70.ooo 75.000 80.000 85.000 90.000 95.ooo
46*19o 49.49° 53-789 56-088 59-388 62.687
34*086 36-735 39.z84 4x*633 44*082 46.53z
37*z43 09.o82 3x.o3o 33-959 34,898 36,837
I7.619 18.878 2o.136 3z.395 23.653 23*9z2
x3,857. 13,776 14-694 xS-6xa z6*53z z7.449
1o.00o 10,7I4 Iz,429 z3.x43 10,857" i3,57I
8-o95 8.673 9-052 9-83o z0*4o8 Io.986
5.7Z4 6,130 6,53x 6"939 7,347. 7,755
4.286 4-592 4*898 5.2o[OCRerr] 5*5zo 5*816
3"333 3-571 3.81o 4-o48 4*286 4*524
[OCRerr],653 3.843 3.o33 3.222 3*41z 3.6oz
2,I43 2*296 3,449 3,603 [OCRerr]-755 3.9°8
Z*746 1,87[OCRerr] 1*995 2,100 3*045 2.370
1"429 z*53z 1*633 1,735 1*837. 1-939
Z,z69 z.[OCRerr]52 z.336 x*4z9 z*$o3 z.586
o*950 Z.o2o 1,o88 I,I56 z,334 1,393
o-769 o.824 o.879 o.934 0.989 z.o44
o.612 o.656 0.700 o,743 0,787. o,831
0,476 o,51o o-544 o,578 o.622 0,646
0.357. o.383 o.4o8 0,434 0*459 0*485
o,250 o,27o o.288 o,3o6 0.324 o,34=
o,159 0.170 0.181 0.193 0.204 0.215
o*o75 O.08Z 0.086 o,o9| o,o97, o,zo2
0*000 0.000 0.000 OeO00 0*000 0.000
ZO0*OO0
65,986
48,98o
38,776
aS*z 7o
t8.367
14*[OCRerr]86
1z.565
8.z63
6.I[OCRerr]2
4*760
3,79°
3.06X
2,494
2.04I
Z*670
1,36Z
1-099
o,875
o,68o
0,510
0.360
o*[OCRerr]7
o.107
0.000