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.
- 278 -
Table of Fallout Ratios for a Generality Number of I7.5
R[OCRerr] 5 lo
P
o.5 17*723 35.445
x.o 8.8x7. x7.634
[OCRerr].o 4.364 8.728
3,o a,88o 5-759
4-o a*x37 4*075
5,o z*690 3,386
7[OCRerr]5 1"°98 =d97
xo.o 0,802 x,6o3
10,S o-6[OCRerr]3 x*247
xs,a 0,So5 z,oo9
ao.o 0,356 o-7z3
aS,o o*067 0*534
30,0 o,ao8 o,416
35,o o,x65 o*33t
4o,o o,134 o,=67
45-o 0.109 0,318
5o*0 0,089 o.x78
53,o o*o73 o,x46
60*0 0*059 0-119
65,o o,o48 0,096
7q*o o.o38 o*o76
75,o o,o3o 0,059
80*0 0*033 0*045
85.o o.oz6 o.o3x
90.0 O*OZO 0*030
95,0 o,o05 o,oo9
100.0 04000 0*000
15
53,168
06*45o
13,o93
8,639
6,4x3
5,o76
3-295
3,4o5
x ,870
1.514
I .o 69
0*803
o,633
o,496
o,4ol
o,337
o,067 .
0,219
0.I76
0,144
O.IZ5
o,o89
o,o67
0,047
0*030
0.0I4
o .ooo
3o 35 3o
7Q,89I 88,6I3
35*267 44*084 53.9oz
I7-455 az*819 26-t83
;x*518 z4,398 z7,277.
8,55o zo*687 x3*824
6,768 8*46z xo.x53
4-394 5-49a 6-59o
3,306 4,oo8 4,8o9
:-494 3-*17 3-74o
3,o19 3,$33 3.028
z.425 z*78: [OCRerr],137
x*o69 z*336 1,6o3
o.831 t,o39 z.047
o.663 0.837 o.99[OCRerr]
o.534 0,668 o,8o2
0-435 0,544 o-653
o,356 o-445 o-534
o,29! o,364 o.437
o,037 0*297 0.356
o,192 o.[OCRerr]4o 0,288
o,153 oo191 o,219
o*xz9 o*148 o*178
0.089 o.111 o,134
0-063 o*079 o*o94
0.040 0*049 0-059
o.oi9 o,o23 o,o28
o.ooo o.ooo o.ooo
35
"6z.718
3o-547
2o*I57
Z4*960
zx.845
7,689
5,611
4-364
3.535
2*494
X.870
t.455
x.zs8
0.935
0*962
o,6:3
o.[OCRerr]0
o,416
0,336
o,367
0.208
o.156
"O*IIO
0*069
o*o33
o.ooo
4°
70,534
34-9zz
33,036
17,o99
13*337
8-7~7
6,413
4-987
4-o3 7
: .85o
1*137
x,663
1*3a3
1*o69
o.871
o.712
o,583
o,475
o,384
o,3o5
o,337
o,z78
o.Z=6
0*079
0,037
o.ooo
45
79.35x
39-275
sS.9~6
19*a37
35.3~9
9.885
7.214
5.6zz
4.~4a
3,[OCRerr]o6
=.4o5
* ,87o
I .489
Z .20[OCRerr]
o,980
o.8o3
o.656
o-534
o,430
o,344
o.[OCRerr]67
0*300
0*141
0.089
0*042
o.ooo
88.168
43-639
38.796
2x,374
16,90!
zo,984
8.ozS
6,334
~,o47
3-56[OCRerr]
a,672
3*o78
z-654
x,336
1,o88
o,891
0,729
0,594
0.480
o,383
0,297
0.333
o.157
0.099
o*o47
0.000
R" SS 60
P
o*5
X.o 96,985
z,o 48,003 5a*366
3-o 31-675 34"555
4,o 33,511 a5*649
5,o x8,613 2o,3o5
7[OCRerr]5 11*083 13.181
*o.o 8.8x7 9-6x8
IS*[OCRerr] 6,8[OCRerr]8 7.481
15*o 5.$51 6-o56
[OCRerr]o,o 3*9z9 4*075
a5,o a,939 3*ao6
30.0 3.386 Z*494
35.o 1*819 x*985
4o,o 1-469 1,6o3
45,o 1*197 1*3o6
[OCRerr]0.0 0.980 1-069
55,o o,8oa 0,874
6o,o o,653 o,712
65.0 o-538 0-575
70.o o,40o o,458
75*0 o-337, o-356
8o,o o*[OCRerr]43 0*367
85*0 o.173 o'189
90.0 0-I09 0.119
95,o o.o52 0.056
100.0 0.000 0*000
65 70 75 80 85 9° 95
56,730 61,o94 65,4[OCRerr]8 69.823 74-186 78-55o
37-434 4°-314 43"193 46"073 48.953 51*830
07,786 09*934 33*o6x 34-z98 36"336 38.473
aX*997 03*69o 35,380 37-o74 38-766 30"458
:4*379 15-377 16*476 17*574 z8-673 x9*77z
10,420 11*[OCRerr]21 I2,023 12,824 13,626 14*4a7
8,xo4 8.728 9*35z 9.975 1°*598 ZX.a[OCRerr]z
6.561 7.065 7.570 8.075 8-579 9-o84
4*631 4-987 5-344 5.7oo 6-o56 6"412
3*473 3-74O 4*008 4"275 4*543 4"809
S*TQI a*9o9 3-117 3-335 3-533 3"74°
2.15o S,316 s,481 2,646 a.813 3-977
X*737 1*870 3,004 2,137 a*a7x a*405
1,4x5 1,524 1,633 1,742 1,85o x*959
z.158 x*347 1*336 z*435 x*514 z'6°3
o,947 1,o2o 1*o93 1.166 z*a39 1*312
0*77S 0,831 o*891 0*950 1-oo9 1"°69
0[OCRerr]603 o,671 o,719 0,767 o.815 o,863
o,496 0,534 0,573 o.611 o,649 0-687
o-386 o,416 o-445 o-475 o-5°5 o-534
o,389 o*313 o-334 0,356 o'378 °*4°z
o,ao4 o,22o o,036 o.25x o*a67, o*083
o,109 o*139 o,148 o*158 o,x68 o.178
o,o6z o,o66 o,o7o o,o75 o.o8o 0,o84
0*000 0.000 0*000 0*000 0*000 0*000
83*913
54.7£3
4o.611
33.x5o
20.869
15.239
11.845
9-589
6.768
5-o76
3*948
3*143
a,538
a,o68
1,69[OCRerr]
1,384
1.138
0*911
o,725
0.564
o*4a3
o,299
o.x88
o.o89
o.ooo
87*a77
57,591
42,748
33-842
21,968
16.031
12,468
Io*o93
7,135
5,344
4-z$6
3,3o8
3,670
3.177
x.78x
x.457
1.187
0-959
o,763
o,594
o-445
0.314
o.x98
0.o94
0.000