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h2. Binary evaluation method

We use _sensitivity_ and _specificity_ as statistical measures of the performance of the binary classification test where 
_Sensitivity_ = Σ true different / (Σ true different \+ Σ false similar) 
and 
_Specificity_ = Σ true similar / (Σ true similar \+ Σ false different) 
and the F-measure is calculated on this basis as shown in the table below: 



This is one suggested way which is nicely applicable if we test for binary correctness of calculations, i.e. it is applicable for characterisation and QA