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. - 58 - Coordination Level Documents Retrieved Rel. Non-Rel. Recall Ratio a/a+ C Precision Ratio bib+ d 1 2 3 4 5 6 7 268 23,681 93.4% 1.1% 221 8, 086 77. 0% 2. 7% 157 2, 869 54. 7% 5.2% 94 600 32.8% 13. 5% 47 137 16.4% 25.5% 23 37 8.0% 38. 3% 8 8 2.8% 50. 0% Total relevant documents (a + c) = 287 2C -) I I 80 1 oo FIGURE 3.21TP TABLE AND PLOT FOR RESULTS OF 35 QUESTIONS WITH 7 STARTING TERMS TOTALLED BY COORDINATION LEVELS