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Table 2 Training on 2008–2010 documents and testing on 2011 documents, n = 19

From: Prediction of relevant biomedical documents: a human microbiome case study

  Maybe + yes Maybe + no
Correctly classified 8 42.11 % 12 63.16 %
Incorrectly classified 11 57.90 % 7 36.84 %
Kappa statistic 0   0  
Mean absolute error 0.58   0.37  
Root mean squared error 0.76   0.61  
Relative absolute error 118.46 %   78.61 %  
Root relative squared error 154.09 %   125.79 %