Course

BRAINCheck · CT & AI LAB · ORIGINAL COMPANION WORKSHEET

Accuracy के पीछे की कहानी

Compare overall accuracy with group-specific errors.

Name: ____________________ Class: ______ Date: __________

A single percentage can hide uneven performance. If a test contains nine blue cards and one green card, a system that always says blue scores 9/10 while failing every green example. Record the test composition and errors by relevant category. A small constructed example demonstrates a limitation; it is not evidence about a real product.

A paper classifier scores 90% on nine blue cards and one green card by predicting blue for every card. Its report says both colours are recognised well.
  1. Draw the ten cards and write the prediction beside each.
  2. Calculate overall correct/total and correct/total for each colour.
  3. Explain which conclusion the overall percentage hides.
  4. Propose an additional test that would reveal the weakness clearly.

Quick check

How many green cards were correctly recognised in this example?

○ 0 of 1

○ 1 of 1

○ 9 of 9

○ 10 of 10

My correction / justified conclusion

Evidence and reference actually checked

My reasoning, uncertainty and reflection

Use fictional/non-personal examples. Public worksheet; save or submit work only through your own notebook. Suggested 60-minute activity. Not an official NCERT/CBSE assessment or certificate.