CRANV2 Main test results chapter 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. - 104 - FIGURE 4. 203T Index Language 1.6a (S.T. Synonyms, C[OCRerr]uasl-synonyms, Word forms, Ex.haustivity of Indexing 3 Search Rule A Document Relevance 1 - 4 Number of Documents in Collection 200 (Subset 1) Number of Questions 42 (Subset 2) Number of Relevant Documents 198 Generality Number 23.6 Coordination) Coord- Documents Rec[OCRerr]dl Precision Fallout ination Retrieved R atio Ratio R atio x y z Level Rel. Non-rel. a/a+c a/a+b b/b+d 1 195 6,347 98.5% 2.9% 77,428% 42 42 42 2 179 3,763 90.4% 4.5% 45.879% 42 42 42 3 151 1,785 76.3% 7.8% 21.763% 42 42 42 4 120 768 60.5% 13.5% 0,364% 37 41 41 5 79 280 39.9% 22.0% 3.414% 31 39 39 6 47 87 23.7% 35.1% 1.061% 23 33 33 7 27 20 13.6% 57.4% 0.244% 15 27 27 8 7 1 3.5% 67.5% o.o12% 3 18 18 9 5 1 2.5% 83.3% 0.012% 2 11 11 I0 0 1 o. 0% o. 0% o. ol 2% 1 7 7 II 0 0 0 3 3 12 0 0 0 1 1 13 14 15 Ioo °o\ 70 IO \' \ o IO 20 I [OCRerr].[OCRerr] o so 4o so 6o [OCRerr]o so go % PRECISION IOO