let us consider the following validation data set confusion matrix is the result of a logistic regression model which includes if the patient will have a heart attack as a dependent variable which is connected to the range of independent variables. In this model y=1 indicates heart attack and y=0 indicates not having a heart attack. Cutoff value is considered 50 per cent.   Calculate sensitivity, specificity and overall error of the model. Considering this confusion matrix do you think shall we make a change in the cut-off value? Justify your answer.       Predicted class     1 0 Actual class 1 0 2700 70 1000 3068

A First Course in Probability (10th Edition)
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let us consider the following validation data set confusion matrix is the result of a logistic regression model which includes if the patient will have a heart attack as a dependent variable which is connected to the range of independent variables. In this model y=1 indicates heart attack and y=0 indicates not having a heart attack. Cutoff value is considered 50 per cent.

 

  1. Calculate sensitivity, specificity and overall error of the model.
  2. Considering this confusion matrix do you think shall we make a change in the cut-off value? Justify your answer.

 

 

 

Predicted class

 

 

1

0

Actual class

1

0

2700

70

1000

3068

     

 

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