CRANV2 Methods for presentation of 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. - 54 - Coordination Level 1+ 2+ 3+ 4+ 5+ 6+ 7 FIGURE 3.1ST Recall Fallout Precision Ratio Ratio Ra*.lo A B A ]3 A B 93.4% 93.4% 48. 329% 48. 330% 1.1% 1.7% 77.3% 77.3% 16. 500% 16. 502% 2.7% 4.2% 54. 7% 55. [OCRerr]% 6.954% 6. 055% 5. 2% 8.7% 32.8% 31. 2% 1. 540% 1. 538% 13. 5% 24. 4% 16.4% 14. 9% 0. 547%. 0. 586% 25. 5% 54.3% 8. 0% 6. 9% 0. 381% 0. 377% 38. 3% 64. 2% 2. 8% 3.3% 0. 192% 0. 190% 50. 0% 77. 8% A Average of Numbers B Average of Ratios COMPARISON OF RECALL, FALLOUT AND PRECISION RATIO WIIEN TOTALLED BY (A) AVERAGING OF NUMBERS AND (B) AVERAGING, TItE RATIOS FOR 35 QUESTIONS. 3O 2O I0 FIGURE 3.19P AVERAGE OF THE RATIOS AVERAGE OF THE NUMBERS PLOT OF RECALL AND PRECISION RATIOS FROM FIGURE 3. 18T COMPARING TOTALLING BY AVERAGING TIIE NUMBERS AND AVERAGING THE RATIOS