Consider query q, which has 2 relevant documents in the collection. Let a ranking algorithm generate return 4 results: rx x X, Where r means "relevant" and x means "non-relevant" What is the precision for this result? What is the recall? What is the average precision of the ranking? What is the DCG at position 4? Make any assumption necessary.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Computer science
Consider query q, which has 2 relevant
documents in the collection.
Let a ranking algorithm generate return 4
results: rx x X,
Where r means "relevant" and x means
"non-relevant"
What is the precision for this result?
What is the recall?
What is the average precision of the ranking?
What is the DCG at position 4? Make any
assumption necessary.
Transcribed Image Text:Consider query q, which has 2 relevant documents in the collection. Let a ranking algorithm generate return 4 results: rx x X, Where r means "relevant" and x means "non-relevant" What is the precision for this result? What is the recall? What is the average precision of the ranking? What is the DCG at position 4? Make any assumption necessary.
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