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.
- 287 -
fallout Ratios for a Generality Number of 50.0
5 lo *5
5a.368
16.o53 52.1o5 78.158
12.895 25.789 38,684
8,5o9 17.ol8 25.526
6.3t6 12.632 18.947
5,000 I0,000 15.00o
3.2'46 6,491 9.737
2"°368 4"737 7"I05
1.842" 3.684 5.526
1,491 a'982 4"474
t.o53 2,.to5 3°*58
o.789 1,579 2.368
o.614 1.228 t.842
0.489 o,977 z.466
o.395 0-789 t.,84
o,322 o,643 o.965
0.2"63 0.526 0.789
0,215 o,431 0.646
0.175 0.351 0-526
0.142 0.2"83 0.425
o.113 0.226 0.338
o,o88 o.175 0.263
0.066 o. t3a o.197
o*046 o*o93 o.139
0,02"9 o.os8 0.088
OlOt4 0.028 0,042
o.ooo OOOOO
51.579
34.035
25.263
20.000
12.982
9"474
7.368
5-965
4.211
3.158
2.456
1.955
1.579
1,287
1.o53
o.861
0.7o2
o,567
o.45i
o.351
0.263
0,186
0.117
0.055
o.ooo
64.474
-544
3'-579
25.000
16.22,8
~1.8
9.211
7- 456
5.263
3-947
3.070
2-444
1-974
:.6o8
1.316
1.o77
o.877
o.7o9
0.564
0.439
0.329
0,[OCRerr]32,
o.146
0.069
o,ooo
3°
77.368
5t.o53
37.895
~o.ooo
19.474
14,211
11.o53
8.947
6.316
4.737
3.684
2,932
2.368
1.93o
i.579
1.292
*.o53
0.850
o.677
0.526
o.395
0,2,79
o,175
0.083
o.ooo
35
90.2'63
59.561
44.2~1
35.000
22",719
16.579
Ia.~95
10.439
7.368
5.5=6
4.298
3, 421
2.763
2.251
1.842
.507
I.[OCRerr]28
o.992
o.789
0.614
0.46i
0.325
0.205
0,097
o.ooo
4o
68,o7o
5o.526
40.000
2'5.965
18.947
*4.737
11.93o
8.42'*
6.316
4.912
3,9*o
3.158
2.573
2.105
1.722
1.4o4
t,134
0.902
0.702
o.526
o.372
o.234
0,111
OOOOO
45
76-579
56.842
45.000
29.211
2t.316
t6.579
13.421
9" 474
7.*05
5.526
4.398
3-553
2.895
2.368
1.938
1.579
*.275
1.o[OCRerr]5
0.789
o. 592
o,418
o,263
0.125
0.000
5°
85.088
63.158
50.000
32 456
23.684
18. 421
t4.912
:o.s26
7,895
6. t 4°
4,887
3-9 47
3.2[OCRerr]6
2.632
2.t53
1-754
. 417
1. 12,8
0,877
0.658
o, 464
0,293
o,139
o,ooo
60 65 7o 75 8o 85 9° 95
93.596
69.474 75.789 82.,o5 88.[OCRerr]1 94.737
55.ooo 60.000 65.000 70.000 75.000 80.000 85.000 90.000 95.000 1oo.ooo
35.7o2 38-947 42.'93 45-439 48-684 51-93° 55-175 $8"4at 61,667 64,912
26.o53 2,8.421 3o,789 33,158 35-526 37,895 40-263 [OCRerr],632 45°000 47.368
ao.2,63 aa.ioS 23.947 25.789 27.632 2'9.474 31.316 33. t58 35.°00 36.8
16.4o4 17.895 19.386 2o,877 2,2,.368 2'3.860 2'5.351 26.842 28,333 29"825
ti.579 12.63[OCRerr] ,3.684 14.737 15.789 16.842 17.895 18,947 20,000 21.o53
8,684 9,474 1o,263 11-o53 11,8 [OCRerr] 12.632 13.42'1 14-[OCRerr]11 15-o°° 15-789
6,754 7,368 7#982 8.596 9.2,L 9.82[OCRerr] 1o.¢39 11.o53 11-667 12,281
5.376 5,865 6.353 5.8 [OCRerr] 7,33t 7.82,o 8,3o8 8,797 9.286 9,774
4,342 4,737 5,132 5.526 5.92 I 6, 3*6 6,7ii 7- 1o5 7.5°0 7-895
3- 538 3*86o 4, i 8 * 4" 503 4" 82 S 5" I 46 5" 468 5" 789 6, I i i 6, 433
a.895 3.158 3.4at 3,684 3-947 4-211 4,474 4-737 5.000 5"263
a.368 2.584 2'-799 3-o14 3.23o 3-445 3"660 3"876 4"°91 4"3[OCRerr]6
1.93o [OCRerr],1o5 2.281 2.456 z,632 s,8o7 a-98a 3-i58 3-333 3-509
i.$59 1.7oo 1.8[OCRerr] t.984 2.126 [OCRerr].567 3.409 2".551 a*69S 2.834
I%a41 £-353 1"-466 4-579 1-692 I.8o5 to917 seo3o 2',i43 2',2'56
0.965 i-053 1.%40 1.2,2,8 1,316 I.404 te491 1,579 1°667 1-754
0,72[OCRerr] 0,789 o,855 0.92I o,987 1,053 i.ii8 ie184 1.250 I°316
o.5it 0.557 o.6o& 0.650 0.697 o-743 0-789 °'836 o,885 o,929
o,32,2 o,351 0.380 0.409 0.439 o. 468 oe497 o,52'6 o,556 0.585
o,152, 0.166 o.18o o,1,94 o°2,08 0,2,2,S OeS3S o,249 o,263 o,2"77
OeO00° 0.000 0$000 0.000 OeO00 OeO00 OeO00 OeO00 OeO00 OeO00