Page 345 - Artificial Intellegence_v2.0_Class_11
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Number of books
Text Books Fiction Autobiographies Self-help books Periodicals, journals
12. Consider the following confusion matrix and answer the questions (i) – (ii):
REALITY
CONFUSION MATRIX
TRUE FALSE
TRUE 86 12
PREDICTION
FALSE 10 79
i) Calculate F1 Score.
ii) How many in total were predicted ‘yes’ and ‘no’?
Ans. i) Recall, Precision and F1 Score are calculated as follows:
Precision = TP × 100% = 86/(86+12) = 87.75%
TP + FP
Recall = TP = 86/(86+10) = 0.89
TP + FN
F1 Score = 2 × Precision × Recall = 2 × 0.87 × 0.89 = 0.88
Precision+Recall 0.87 + 0.89
ii) No. of Predictions “YES” – 96
No. of Predictions “NO” – 91
13. Calculate the Variance and Standard Deviation of the values 2, 7, 14, 4, 16, 18, 23, 27, 29, 35.
Ans. Variance = 110.65 Standard Deviation : 10.51
14. See Computer Vision at work! Go to website https://developer.opencv.fr/ui/#/onboard/demo
Check out their face comparison and face detection feature.
15. Ask AI to generate an image for you. Go to website https://app.runwayml.com/ Create a free login
and check out their Text to Image feature. Generate wacky images like cat on a bicycle, Earth seen
from moon etc. Enjoy!
Practical Questions 343

