Index the document collection and compare the retrieval performance using different weighting methods.

Weighting Method: (i) TFIDF, (ii) BM25

You may choose to use any variant of the above two weighting methods.

Evaluation Matrix: Precision@k, AveragePrecision@k, MAP@k, Recall@k, AverageRecall@k, MAR@k.

You also compare the weighting methods by plotting MAP@k vs MAR@k. The values of k can be considered k=10, 20, 30, and so on as appropriate.