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.
ii-61~
Number and Percentages of
Individual Requests
IlSuperiority?1
Option I Option [OCRerr] Both Options Percentage
Equal
1
Numbers 6 [OCRerr] 2
2
Percentages ignoring 60% [OCRerr]o% 20%
equal cases
3
Percentages including
equal cases 50% 33% 17% 17%
Percentages adding
equal cases to 67% 50% 17%
both options
Illustration of Methods of Computing Percentages of the
Numbers of Requests Favoring Given Options.
Fig. 35