A kiln-crack matrix counts 42 true cracks called crack, 48 true sound tiles called sound, 7 sound tiles called crack, and 3 true cracks called sound. What is accuracy as (TP + TN) / all × 100%?
Select an answer to reveal the explanation.
Short Explanation
TP 42, TN 48, FP 7, FN 3. All is 100. Accuracy is (42 + 48) / 100 times 100 percent, which is 90 percent. 84 percent uses a wrong numerator, 93 percent mishandles the false cells, and 42 percent is TP alone.
Full Explanation
TP = 42, TN = 48, FP = 7, FN = 3. All = 100. Accuracy = (42 + 48) / 100 × 100% = 90%. 84% uses a wrong numerator, 93% ignores the false cells incorrectly, and 42% is TP alone. This is K3 calculation, not a request to train a better net.