A document database consisting of 10 documents is used to test search engine
"G". The following sequences of relevant (R) and not relevant (N) are
obtained from 3 experimental queries:
R R R N R N N N N N
N R N N N R N N N R
R N N N N N R R R N
1. Draw the PR curves and determine the 3-point averages.
2. Search engine "Y" is tested using the same queries, and gives the following results:
N R R R R N N N N N
N R N N N R N N N R
N R R R N N R N N N
Draw the PR curves and determine the 3-point averages. Compare search engines
"G" and "Y".