ANALYSIS & DISCUSSION  PRECISION, RECALL AND F-MEASURE

4. Analysis & Discussion

 Precision, Recall and F-measure: Precision and recall are the traditional measures that have This section discusses and analyzes the aforementioned been long used in information retrieval while the F-measure models proposed by QA researchers in section (3). Researches is the harmonic mean of the precision and recall; these three are presented and discussed in a chronological order metrics are given by: describing the main contributions, experimental results, and Precision = number of correct answersmain limitations for each research. However, as an number of questions answeredintroductory subsection, the metrics used in evaluating QA systems are first presented to give a thorough explanation and understanding of the meaning behind the experimental results Recall = number of correct answersobtained by the QA researches. At the end of the discussion, number of questions to be answereda following subsection summarizes and concludes what had been analyzed and discussed. F-measure = 2 (Precision × Recall)Precision + Recall