From a set of documents in which it is known that four documents relevant to a p

Question

From a set of documents in which it is known that four documents relevant to a particular query exist, an information retrieval system returns three of these documents, and another two irrelevant documents. Which of the following statements are true? Select one or more: a. The F2-measure would be higher than the F1-measure b. Recall is 0.75 exactly c. Precision is 0.65 exactly d. The F1-measure is 2/3. e. The F-measure with beta = 0.5 would be higher than the F1-measure f. The F1-measure is more than it would be if recall and precision were equal, at 0.675

Explanation / Answer

a. The F2-measure would be higher than the F1-measure

f. The F1-measure is more than it would be if recall and precision were equal, at 0.675

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