IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Evaluation Parameters
chapter
E. M. Keen
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
11-23
Macro Definition (Arithmetic Mean)
Median
Precision
1.0 -
0.8 -
0.6 -
0.4
0.2
`````[OCRerr] Re ca II
0 0.2 0.4 0.6 0.8
V
1.0
ADI, Abstracts, Thesaurus, Averages of 22 Requests
Canparison of Average Results Using Mean and
Median of the Individual Requests.
Fig. 13