Method getTestedNegative

libraries/GST/GST.cpp:110–110

float GST::getActualNegative() { return AN; };
float GST::getTestedPositive() { return TP + FP; };
float GST::getTestedNegative() { return TN + FN; };

float GST::sensitivity()       { return TPR(); };
float GST::specificity()       { return TNR(); };