Computer Science · Information Retrieval

An information retrieval (IR) system is designed to analyze, process, store, and retrieve sources of information that match a user's requirements. Which of the following statements are correct regarding IR systems? Statement I: Precision is the fraction of retrieved documents that are relevant to the user's query. Statement II: Recall is the fraction of retrieved documents that are actually present in the entire collection. Statement III: The TF-IDF (Term Frequency-Inverse Document Frequency) weighting scheme gives higher importance to terms that are frequent in a document but rare across the entire collection.