Refer to the following confusion matrix. Answer questions y n P 13 27 N 25 35 Wh
ID: 3326416 • Letter: R
Question
Refer to the following confusion matrix. Answer questions
y
n
P
13
27
N
25
35
What is the overall error rate? _________%
Refer to the confusion matrix above. It can be inferred from the confusion matrix that____________negative observations are misclassfied as positive
Suppose that the confusion matrix presented in Question 2 is obtained under the cutoff success probability of 0.5. Which of the following statements are true if we increase the cutoff success probability to 0.8? Select all that apply.
a.
The fase positive rate is likely to decrease.
b.
The true positive rate is likely to increase.
c.
d. The true negative rate is likely to increase
The false negative rate is likely to decrease.
y
n
P
13
27
N
25
35
Explanation / Answer
y
n
P
13
27
N
25
35
ERROR RATE = (25+27) / (13+27+25+35) = 0.52
i.e. 52%
It can be inferred from the confusion matrix that 25 negative observations are misclassfied as positive.
y
n
P
13
27
N
25
35