Question: What is a similarity function? What is Retrieval Effectiveness? How is Retrieval Effectiveness measured? What is recall? What is precision? What happens to precision when

  1. What is a similarity function?

  2. What is Retrieval Effectiveness?

  3. How is Retrieval Effectiveness measured?

  4. What is recall?

  5. What is precision?

  6. What happens to precision when recall increases?

  7. Compute the dot product of these two vectors <4,5,8> and <8,0.1,-1>

  8. Compute the dot product of these two vectors <1,1,0,-7,0,8> and <0,1,1,7,0,8>

  9. Compute the length or norm of vector <4,5,8>

  10. Compute the recall and precision for the following scenario. Suppose for a given query, there are 30 relevant documents in the collection. Suppose when 15 documents are retrieved, 9 are identified as relevant.

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