Question

The x-axis of the cumulative lift chart is the total number of observations predicted to be positive, and the y-axis is the number of positive observations correctly predicted to be positive. Refer to the test score table.  When the cutoff success probability is 0.5, what is the point on the model's cumulative lift curve?

	a.	(4,3)
	b.	(2,2)
	c.	(2,0)
	d.	(4,4)

Refer to the actual class outcomes in the test score table. Which of the following points is on the random classifier's cumulative lift curve?

	a.	(2,2)
	b.	(4,2)
	c.	(4,3)
	d.	(2,0)

The x-axis of the ROC curve is the true positive rate, while the y-axis is the false positive rate. Refer to the test score table.  When the cutoff success probability is 0.5, what is the point on the model's ROC curve?

	a.	(0.25, 0.25)
	b.	(0.5, 0.5)
	c.	(0.25, 0.75)
	d.	(0, 0)

Which of the following points is on the random classifier's ROC curve?

	a.	(0, 1)
	b.	(0.25, 0.75)
	c.	(0.25, 0.25)
	d.	(0.5, 0.75)

Actual Class	Success Probability
P	0.96
P	0.93
N	0.92
P	0.85
N	0.45
N	0.35
P	0.25
N	0.1

Answer 1

1. Point on model cumulative lift curve is option - b (2,2)

2. Point on random classifier cumulative lift curve is option - c (4,3)

3. Point on model ROC curve is option - b (0.5,0.5)

4. d (0.5,0.75)