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.
- 276 -
Table of Fallout Ratios for a Generality Number of 12.5
R[OCRerr] 5 [OCRerr]o '-5 2o 23 30 35 4° 45 50
P
0"2 *2"595 25-[OCRerr]9° 37-783 5o,35o [OCRerr]:,97S 75-57Q 88,I65
t,o 6o_[OCRerr] 66 t2o532 iS" 797 25"063 3'-,329 37"595 43-861 50,I37 56,392 6a,658
[OCRerr],o 3, toi 6,=o3 9,304 :2.405 [OCRerr]5.5o6 18,609 31,729 34,8to a7,9rz 3i,ot3
3,o 2,o;6 4,093 6, t39 8.186 [OCRerr]o,232 Zs,378 I4,335 x6,37r 18,418 ao,464
4-° 1,5t9 3-o38 4-557 [OCRerr]-o76 7,595 9"114 I°-633 Ia-rss 13-67t t5,;90
5°o I'203 2"405 3"6°$ 4"[OCRerr]:° 6°0`-3 7"=t5 8"4[OCRerr]8 9-620 IO,823 1[OCRerr],O3[OCRerr]¢
7- 5 O, 7[OCRerr]I [OCRerr]., 561 a, 342 3, '.22 3,903 4,684 5,464 6,245 7,Oa5 7,806
[OCRerr]o,o 0,570 1,139 [OCRerr],7o9 2,278 2,848 3o418 3"987 4"557 5-t27 5,696
12,5 o. ,43 0,886 *.329 ±.772 2.2tS S-658 3-fOX 3"544 3"987 4,430
15, o o,359 o,717 1.O76 I, 433 `-, 793 =-ISS S-SiX S-869 3,3[OCRerr]8 3.586
20, o O, = 53 o, 5o% O, 75 [OCRerr] :.c 13 :.2 66 I,SZ 9 Z,772 3-oa5 a,278 a,532
[OCRerr]5,o o,19o 0,380 o,57[OCRerr] c,759 o,949 x-g39 I,aa9 I,SI9 1,709 I,[OCRerr]99
30,0 o. t48 o,295 0,443 0,501 o,73[OCRerr] 0,886 I-o34 I,zSt x,329 1,477
35,0 o, t*8 o,235 0,353 .[OCRerr]. ¢70 o,5[OCRerr]8 0,705 o,823 0,940 1,o58 t,t75
40,0 o,o9[OCRerr] o.19o o.[OCRerr]85 o.35o o, 475 o-57Q 0-665 o,759 Oe854 0,949
45" o o, 077 o, t 55 o,232 o, 309 O, 387 O, 464 o ®54z O 619 O ,696 O "774
50-0 0-063 o-127 o-29o o-253 o-3`- 6 0-380 0-443 O,[OCRerr]O6 0,570 O,633
[OCRerr]5,O O,O[OCRerr] O,tO4 o,155 0,207 O,[OCRerr]9 O,3II O,36[OCRerr] O,4I4 0,466 O,5t8
60,0 0,042 0,084 o,t[OCRerr]7 o,169 o,21t o,a53 o,295 0,338 o,38o o,4[OCRerr]2
65.o 0,034 0.068 o, to: o.[OCRerr]35 o.17o o.=o4 o,[OCRerr]39 0,[OCRerr]73 0,307 . 0,34!
7o, o o,o27 o.o54 o.o8[OCRerr] o.`-o$ °-t36 °-I63 o,t9o o-317 0-344 o,[OCRerr]7z
75,O 0,02 I O,O 42 O.O63 O, oS 4 o, [OCRerr]o5 O, I[OCRerr]7 o [OCRerr] 48 o , 169 o,z[OCRerr]o 0,2 I!
9o, o 0,0*6 o,o32 0-047 0,063 o,o79 0,095 o,*II o,t[OCRerr]7 o,[OCRerr]42 O,X58
95,O O,Ot* 0°022 0,034 o.o4[OCRerr] 0,056 0-067 0-078 0,089 [OCRerr],IoI o,tl*
9o,o 0,007 OoOI 4 0,02 i o,o[OCRerr]8 0,035 O,o42 0,049 o ,O56 O,O63 0,070
95,0 O,OO3 0,007 o,oIo O,o13 OoO17 O,O=O O,OS3 0,0=7 o,o[OCRerr]o 0,033
lOOeO o,ooo o,ooo o,ooo o,ooo o,ooo o,ooo o,ooo o,ooo o,ooo o,ooo
R" 55 6o 65 7o 75
P
0-5
t,o 68,934 75,29o 81,456 87,722 93,987
=.o 34. I14 37.[OCRerr]x5 4o.316 43.4t8 46.529
3.0 aa-5*x 24.557 =6.6o3 s8*65o 30.696
4.o z6.7o9 t8.3=8 *9-747 3*.266 23.78[OCRerr]
5.0 z3.as8 z4.43o 15-633 `-6,835 18.o38
7[OCRerr]5 8-586 9-367 xo-z48 *o-9;8 *[OCRerr]-7o9
Io.o 6.[OCRerr]66 6.835 7,4o5 7,975 8,544
t[OCRerr]'5 4"873 5"316 [OCRerr]o7[OCRerr]9 6"ao3 6,646
I5-0 3-945 4-304 4.66= 5-os! 5-380
ao.o =-785 3"°38 3*29x 3"544 3-797
25-o a-089 a.278 a.468 3.658 a.848
3o.o z.624 z.772 z,9ao 3.068 3.az5
35-o x-393 *.4to *.538 1.646 t.763
4°.0 I.o44 1.I39 x.[OCRerr]34 1.329 1,434
45-0 0,851 O,938 1,OO6 1,083 I,I60
5o,o O,696 0,759 O,833 0,886 O,949
$5-0 0°570 0.62X 0.673 o.725 0.777
60.0 o.464 0.506 0,549 0.592 0-633
65-0 0-375 0-409 0.443 0.477 o.$zz
7[OCRerr]-o o-298 0.[OCRerr]5 0.353 0.380 0.407
75-o o*33a o-a53 o-374 o-295 o.[OCRerr]16
80.0 o. I74 o.19o o.3o6 o.aaa 0.337
85-0 o-x33 0-*34 o-z45 o.*56 o.x68
90.0 0.077 0.084 o.o[OCRerr]x 0.098 o.to5
95-0 0.037 o.o4o 0.043 0.047 0.050
gOO.O O.OOO O.OOO O.OOO O,OOO O*OOO
8O
49-6so
3~,743
34.304
I9,34I
Z=-489
9,114
72o89
5-738
4,o51
3-038
a-363
z.881
1.519
1-[OCRerr]38
I,OI3
o.8[OCRerr]9
0.675
0-545
o,434
0.338
o.253
o-I79
O.II3
0.053
0.000
85
53-723
34-789
25-823
ao-443
t3.a7o
9.684
7~533
6.o97
4.304
3.[OCRerr]28
a.512
[OCRerr].998
Z.614
t-3[OCRerr]5
1.o76
0.880
0o7[OCRerr]7
0.579
o.46I
0-359
o,g69
o,19o
0*I30
0.057
0.000
9°
55.833
36-835
27~342
ai.646
I4.o5I
to.as3
7~975
6.456
4-557
3-4x8
a,658
a.xI6
1,7[OCRerr]9
1-393
t,I[OCRerr]9
o-932
0-759
o.6*3
0.488
0.380
o,a85
o[OCRerr]aol
O.IaT.
0,060
0.000
95
58-9~4
38,882
28,86x
aa,848
* 4,83t
to.Bs3
8,4*8
6,8z4
4.8[OCRerr]o
3.608
3.806
a -[OCRerr]33
X,8O4
1-470
IeaO3
0.984
o.8oa
o,648
o.5z5
0.401
0.301
O*[OCRerr]Z&
0-t34
o.o63
0.000
6a,oa5
4o-9~8
30.380
24,o51
15,61*
II-39~
8,862
7"X73
5 "°63
3-797
[OCRerr]'954
a.352
1.899
*-547
z.266
1.o36
0,844
o.68[OCRerr]
o.54[OCRerr]
O*4[OCRerr]a
O,316
O,3[OCRerr]3
O*I4I
O.O67
0*000