Question $15$

$15$ pts

What is ROC Curve? $(3$ points$)$

For the following Table Calculate the Precision, Recall and F$-1$ Score $($F measure$)($using the chap$4$ slides on imbalanced classes on Accuracy, Precision, Recall and F$-1$ Score in Classification$)$ from the matrix: $(4$ points$)$

Explain in detail, if necessary, by providing an example with a change in data in the confusion matrix, how the F$-1$ score has more value than the Accuracy measure for a specific use case, where accuracy score may be misleading. Details of working are as important as your answer. $(3$ points$)$

Predicted

Positive

$TP=400$

Actual Positive

Actual Negative

Predicted

Negative

$FN=300$

$FP=400$

$TN=900$