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Nt1310 Unit 1 Exercise Essay

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Exercise 1 When the threshold/cut off is decreased, meaning that it is being moved towards the left (negative or normal side), the value of both TN and FN will decrease while the value of both FP and TP will increase. Since specificity = TN/(FP+TN) So when the value of TN is decreased, specificity will decrease as well. Also, since sensitivity = TP/(TP+FN) So when the value of TP is increased, sensitivity will increase as well. Exercise 2 A) Sensitivity = TP/(TP+FN) Minimizing FN results would increase sensitivity because when the FN is minimized the TP is maximized so as to maintain a constant denominator (TP + FN). So increasing the value of TP will result in increasing sensitivity. B) Specificity = TN/(TN+FP) Minimizing FP results would

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