ITPEC IP April 2025 Question 3
ITPEC IP April 2025 — Question 3 of 100
0.50 — recall measures how many actual defective products the model successfully finds.
The quality controller identifies the actual defective cases. In that row, 5 images are judged defective by the model and 5 are missed as not defective, so there are 10 actual defective images. Recall is true positives ÷ actual positives = 5 ÷ (5 + 5) = 0.50.
Answer (c)
Why not others:
- (a) 0.05 divides the 5 true positives by all 100 images
- (b) 0.25 is precision, 5 ÷ (5 + 15), not recall
- (d) 0.80 is accuracy, (5 + 75) ÷ 100
Key rule: Recall uses the actual-positive row as its denominator: TP ÷ (TP + FN).
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