Confusion Matrix

Terms:

• True Positive (TP): Observation is positive, and is predicted to be positive.
• False Negative (FN): Observation is positive, but is predicted negative.
• True Negative (TN): Observation is negative, and is predicted to be negative.
• False Positive (FP): Observation is negative, but is predicted positive.

Precision = TP/(TP+FP)

Sensitivity(recall)=TP/(TP+FN)

Specificity=TN/(TN+FP)

Accuracy=(TP+TN)/(TP+TN+FP+FN)