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. - 105 - FIGURE 4. 204T Index Langu[OCRerr]Ee I. 7a (S. T. Synonyn',o, First hierarchical reduction. Exhaustivity of Indexing 3 Search Rule A Document Relevance 1 - 4 Number of Documents in Col2ection 200 (Subset 1) Number of Quee.tions 42 (Subset 2} Number of Relevant Documents 198 GeneraLity Number 23.6 Coordination) Coord- Reca][OCRerr] Precision Fallout ination Ratio Ratio Ratio x y z Level a]a+¢ a/a+b b]b+d 1 193 4,693 97.5% 3.9% 57.235% 42 42 2 i Documents netrieved Rel. Non-rel. 172 2,366 86,9% 6.8% 42 28.847% 42 42 42 3 143 989 72.2% 12.8% 12.058% 42 42 42 4 101 353 51.0[OCRerr] 5 22.2% 4.304% 36 41 41 62 118 31.3% 6 34.4% 1.439% 27 39 38 31 31 15.7% 50.0% 0.378% 20 33 33 7 11 4 5.6% 8 73.3% 0.049[OCRerr] 6 27 27 4 1 2.0% 9 80.0% 0.012% 2 18 18 1 0 0.5[OCRerr] 100.0% 0.000% 1 11 11 I0 0 0 II 0 7 7 0 0 12 0 3 3 0 0 0 1 1 13 14 15 70 80 90 I00