[Data Mining] Condition and test

Condition : reality situation
Test OutCome :  predicted situation

now look this simpler table :


 Contingency table and common performance measurements. 
The abbreviations are for the number of 
true positive (TP), 
false positive (FP), 
false negative (FN) 
 true negative (TN) predictions.
The False Positive Rate (FPR) was calculated as FP/(FP+TN)
 and the True Positive Rate (TPR) as TP/(TP+FN). 
The Matthews Correlation Coefficient (MCC) is shown in equation (i) and the probability excess (PE) in equation (ii).

important values : 
True Positif Rate : TP / P --> 猜对的+ 的比例 （所有真实的+）
False Positif Rate : FP / N --> 猜错的 + 的比例（所有真实的-）