Page 320 - AI Ver 1.0 Class 10
P. 320
The confusion matrix for the same is:
The Confusion Matrix Reality:1 Reality: 0
Prediction:1 22 12
Prediction:0 47 18
Calculate Accuracy, Precision, Recall and F1 Score for the above problem.
TP FP
22 12
47 18
(TP+ TN)
Accuracy = × 100
(TP+ TN+FP+FN)
22 18
+
= × 100
( 22 18 + 12 + 47)
+
40
= × 100 = 40.04%
99
TP Exercise
Recall = = .31
TP +FN
Solved Questions
Precision×Recall
F1 Score = 2 ×
Precision+Recall SECTION A (Objective Type Questions)
uiz
.
64 70 . 31
×
= 2 × A. Tick ( ) the correct option.
64 70 + . 31
.
1. Which of the following is true for Accuracy?
20.057 40.114 a. It is defined as the percentage of correct predictions out of all the observations.
= 2 × = = 0.61
65.01 65.01 b. It is defined as the percentage of true positive cases versus all the cases where the prediction is true.
c. It can be defined as the fraction of positive cases that are correctly identified.
TP
Precision = × 100 d. None of the above
TP +FP
2. What is the formula for Accuracy?
22
= × 100 = 64.70% (TP + TN) (FP + TN)
22+12 a. Accuracy = (TP + TN + FP + FN) × 100% b. Accuracy = (TP + TN + FP + FN) × 100%
(FP + FN) (TP + FN)
c. Accuracy = × 100% d. Accuracy = × 100%
(TP + TN + FP + FN) (TP + TN + FP + FN)
318 Touchpad Artificial Intelligence-X

