Question: 9-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

9-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.

a)Calculate sensitivity, specificity and overall error of the model.

b)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 2700 1000

0 70 3068

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