CRANV2 Supplementary tests and 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. I00 1-4RELEVA[OCRerr]NT DOCUMENTS 16 OR MORE RELEVANT DOCUMENTS COORD- RECALL PRECISION FALLOUT RECALL PRECISION FALLOUT INATiON .qATIO R A'E.IO RAT,[OCRerr]O LEVEi, t :96.7% U. 3% oil i 5 £".: 2 86. I% O. 9% 15.63-5% 3 68.1[OCRerr]o 1.7% 6.382% 4 45.9% 4.1% !.6£-7% 5 25.4[OCRerr]7[OCRerr] 8. i% 0.-t73[OCRerr]0 6 15.6% 16.1% 0.126% 7 10.7% 32.-5% 0. 035% 8 1.6% 2s. 6% u.oo6% 9 o. [OCRerr],% 33.3'7, O. 002% RATIO RATIO RATIO 7"[OCRerr]. v% 6.2% 19. 670% 49.3% 5.5% 14.042% 31.1% 8.8% 5.378% 21.6% 14.7% 2.I01% 10.1% 25.9% 0.486% 5.4% 38.I% o.147% a.o% 75.0% O.OLO% F1CURE 6.L'0TRESULTS AS FIGURE 6.19T GROUPED FOi[OCRerr] QUESTIONS WITH FEW AND MANY IIE LEV.[OCRerr]NT DOCUMENTS i:!I 9O 7O 60 7. R F C 50-- A L. L 2O 0 0.01 o.I b0 I0 FALLOUT FIGUHE 6.21P HECALL/FAI.I.OUT PI.OT OF RI'[OCRerr]SUL'I'5 PRESENTED IN FiGUHE 6.20T to0