Recall and Precision

Recall and Precision

The most important parameters used for evaluating an indexing system are: Recall and Precision.

Recall

    The term recall refers to a measure of whether or not a particular item is retrieved or the extent to which the retrieval of wanted items occur.

    Recall ratio is nothing but the proportion of relevant items retrieved and thus, it is a measure of the completeness of a search in an index file

    The recall ratio has been variously called as hit rate, sensitivity, and conditional probability of a hit.

    The general formula for calculation of recall ratio

                                    Number of relevant

            Recall Ratio =............................... ….... * 100

                                   Total number of relevant

Precision

    The term precision relates to the ability of an indexing system not to retrieve irrelevant items
    Precision ratio is nothing but the proportion of retrieved items that are relevant
    The precision ratio is sometimes referred to as a relevance ratio. 
    formula for calculation of precision ratio

                                   Number of relevant

            Precision Ratio =................................ ….......* 100

                                        Total number

SET (Maharashtra) Examination 16th April 2017

Sr.No.NameDate
1 Commencement of online Application 27 Dec 2016
2 Last date for Applying Online 10 Jan 2017
3 Availability of Admit Card on website 06 Apr 2017
4 Date of Examination 16 Apr 2017

 

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