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Receiver Operating Characteristic (ROC) including season, previous birth and competitions/shows. Weakly positive (green line) results in an area of 0.67, moderately positive (blue line) 0.74 and strongly positive (orange line) 0.78. The accuracy is said to be good if the area under the ROCcurve (Auc) is larger than 0.7. An area close to 0.5 represents no difference against negative titer.
