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AI for students lesson 23: Design a tiny AI project · Set 929 · 40 questions
TalentJR

AI tip (Accuracy = correct ÷ total × 100): Steps: 1 choose a problem → 2 collect examples → 3 label them → 4 check and correct bad labels (clean the data) → 5 split into training and test sets → 6 train → 7 test with new examples → 8 measure accuracy → 9 improve the data and retest. Accuracy = correct ÷ total × 100. Wrong = total − correct. Expected right = accuracy ÷ 100 × total. Keep some examples apart for testing (for example one fifth); the rest are for training.

NameDateTime takenScore ___ / 40
  1. 1.⚖️ Two handwriting reader models were tested on the same 20 handwritten letters. Model A got 19 right and Model B got 16 right. How many percentage points more accurate is Model A?
  2. 2.📋 Planning an AI project: which comes first — work out the accuracy or improve data, retest? (a) work out the accuracy (b) improve data, retest
  3. 3.📋 Planning an AI project: which comes first — correct bad labels or test on new photos? (a) correct bad labels (b) test on new photos
  4. 4.🧪 Why must you test a model on examples it has NOT seen? (a) to save paper (b) to make it bigger (c) to see if it learned (d) to make it faster
  5. 5.📋 Planning an AI project: which comes first — pick a question to solve or improve data, retest? (a) pick a question to solve (b) improve data, retest
  6. 6.📦 Ishaan collected 160 labelled fruit photos for a fruit sorter and keeps one fifth of them for testing. How many are left for training?
  7. 7.📦 Kabir collected 100 labelled fruit photos for a fruit sorter and keeps one fifth of them for testing. How many are left for training?
  8. 8.❌ Ananya’s spam spotter was tested on 45 new messages and got 38 right. How many did it get wrong?
  9. 9.⚖️ Two recycling sorter models were tested on the same 25 waste photos. Model A got 25 right and Model B got 24 right. How many percentage points more accurate is Model A?
  10. 10.🧪 What is accuracy? (a) total − correct (b) total × 2 (c) correct ÷ total × 100 (d) correct + total
  11. 11.📋 Planning an AI project: which comes first — work out the accuracy or label each example? (a) work out the accuracy (b) label each example
  12. 12.⚖️ Two spam spotter models were tested on the same 25 messages. Model A got 25 right and Model B got 24 right. How many percentage points more accurate is Model A?
  13. 13.🎯 Aarav’s recycling sorter was tested on 4 new waste photos and got 4 right. What is its accuracy in percent?
  14. 14.📋 Planning an AI project: which comes first — collect fruit photos or choose what to sort? (a) collect fruit photos (b) choose what to sort
  15. 15.🎯 Kabir’s handwriting reader was tested on 4 new handwritten letters and got 3 right. What is its accuracy in percent?
  16. 16.📋 Planning an AI project: which comes first — try unseen examples or fix it and test again? (a) try unseen examples (b) fix it and test again
  17. 17.🧪 You can plan a simple AI project with… (a) paper and examples (b) nothing at all (c) only a big robot (d) a secret password
  18. 18.🎯 Ishaan’s leaf identifier is 90% accurate. If it is tested on 80 new leaf photos, how many should it get right?
  19. 19.🎯 Meera’s spam spotter was tested on 10 new messages and got 8 right. What is its accuracy in percent?
  20. 20.⚖️ Two bird-song app models were tested on the same 10 bird songs. Model A got 8 right and Model B got 5 right. How many percentage points more accurate is Model A?
  21. 21.📋 Planning an AI project: which comes first — calculate percent right or fix it and test again? (a) calculate percent right (b) fix it and test again
  22. 22.📋 Planning an AI project: which comes first — split train and test or train the model? (a) split train and test (b) train the model
  23. 23.🎯 Aarav’s recycling sorter is 50% accurate. If it is tested on 30 new waste photos, how many should it get right?
  24. 24.⚖️ Two handwriting reader models were tested on the same 10 handwritten letters. Model A got 9 right and Model B got 8 right. How many percentage points more accurate is Model A?
  25. 25.❌ Ananya’s leaf identifier was tested on 22 new leaf photos and got 20 right. How many did it get wrong?
  26. 26.🎯 Rohan’s spam spotter was tested on 4 new messages and got 3 right. What is its accuracy in percent?
  27. 27.📋 Planning an AI project: which comes first — recheck every label or test on new photos? (a) recheck every label (b) test on new photos
  28. 28.⚖️ Two bird-song app models were tested on the same 25 bird songs. Model A got 25 right and Model B got 23 right. How many percentage points more accurate is Model A?
  29. 29.📦 Ishaan collected 200 labelled fruit photos for a fruit sorter and keeps one fifth of them for testing. How many are left for training?
  30. 30.🧪 Your fruit sorter mixes up oranges and lemons. What helps most? (a) a new colour screen (b) a louder speaker (c) more labelled examples (d) fewer examples
  31. 31.📋 Planning an AI project: which comes first — choose what to sort or calculate percent right? (a) choose what to sort (b) calculate percent right
  32. 32.🎯 Ananya’s spam spotter is 80% accurate. If it is tested on 20 new messages, how many should it get right?
  33. 33.⚖️ Two leaf identifier models were tested on the same 25 leaf photos. Model A got 23 right and Model B got 16 right. How many percentage points more accurate is Model A?
  34. 34.⚖️ Two leaf identifier models were tested on the same 10 leaf photos. Model A got 10 right and Model B got 8 right. How many percentage points more accurate is Model A?
  35. 35.❌ Aarav’s leaf identifier was tested on 34 new leaf photos and got 28 right. How many did it get wrong?
  36. 36.📋 Planning an AI project: which comes first — improve data, retest or calculate percent right? (a) improve data, retest (b) calculate percent right
  37. 37.❌ Meera’s fruit sorter was tested on 13 new fruit photos and got 12 right. How many did it get wrong?
  38. 38.📋 Planning an AI project: which comes first — collect fruit photos or recheck every label? (a) collect fruit photos (b) recheck every label
  39. 39.📋 Planning an AI project: which comes first — train the model or calculate percent right? (a) train the model (b) calculate percent right
  40. 40.⚖️ Two recycling sorter models were tested on the same 20 waste photos. Model A got 18 right and Model B got 17 right. How many percentage points more accurate is Model A?

Answer key

  1. 15
  2. work out the accuracy
  3. correct bad labels
  4. to see if it learned
  5. pick a question to solve
  6. 128
  7. 80
  8. 7
  9. 4
  10. correct ÷ total × 100
  11. label each example
  12. 4
  13. 100
  14. choose what to sort
  15. 75
  16. try unseen examples
  17. paper and examples
  18. 72
  19. 80
  20. 30
  21. calculate percent right
  22. split train and test
  23. 15
  24. 10
  25. 2
  26. 75
  27. recheck every label
  28. 8
  29. 160
  30. more labelled examples
  31. choose what to sort
  32. 16
  33. 28
  34. 20
  35. 6
  36. calculate percent right
  37. 1
  38. collect fruit photos
  39. train the model
  40. 5

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