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AI for students lesson 23: Design a tiny AI project · Set 532 · 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.📋 Planning an AI project: which comes first — tag each photo by type or improve data, retest? (a) tag each photo by type (b) improve data, retest
  2. 2.🎯 Arjun’s recycling sorter was tested on 5 new waste photos and got 5 right. What is its accuracy in percent?
  3. 3.🎯 Kabir’s recycling sorter was tested on 5 new waste photos and got 4 right. What is its accuracy in percent?
  4. 4.📋 Planning an AI project: which comes first — fix it and test again or work out the accuracy? (a) fix it and test again (b) work out the accuracy
  5. 5.🧪 What is accuracy? (a) correct + total (b) total × 2 (c) correct ÷ total × 100 (d) total − correct
  6. 6.⚖️ Two recycling sorter models were tested on the same 20 waste photos. Model A got 19 right and Model B got 17 right. How many percentage points more accurate is Model A?
  7. 7.📋 Planning an AI project: which comes first — work out the accuracy or test on new photos? (a) work out the accuracy (b) test on new photos
  8. 8.⚖️ Two spam spotter models were tested on the same 10 messages. Model A got 7 right and Model B got 6 right. How many percentage points more accurate is Model A?
  9. 9.⚖️ Two fruit sorter models were tested on the same 50 fruit photos. Model A got 30 right and Model B got 28 right. How many percentage points more accurate is Model A?
  10. 10.🧪 Your fruit sorter mixes up oranges and lemons. What helps most? (a) more labelled examples (b) a louder speaker (c) fewer examples (d) a new colour screen
  11. 11.⚖️ Two bird-song app models were tested on the same 10 bird songs. Model A got 7 right and Model B got 6 right. How many percentage points more accurate is Model A?
  12. 12.📋 Planning an AI project: which comes first — calculate percent right or try unseen examples? (a) calculate percent right (b) try unseen examples
  13. 13.🎯 Kabir’s spam spotter is 90% accurate. If it is tested on 20 new messages, how many should it get right?
  14. 14.⚖️ Two handwriting reader models were tested on the same 50 handwritten letters. Model A got 50 right and Model B got 44 right. How many percentage points more accurate is Model A?
  15. 15.📋 Planning an AI project: which comes first — calculate percent right or tag each photo by type? (a) calculate percent right (b) tag each photo by type
  16. 16.🎯 Arjun’s recycling sorter is 80% accurate. If it is tested on 70 new waste photos, how many should it get right?
  17. 17.📦 Kabir collected 180 labelled bird songs for a bird-song app and keeps one fifth of them for testing. How many are left for training?
  18. 18.🎯 Aarav’s leaf identifier was tested on 10 new leaf photos and got 8 right. What is its accuracy in percent?
  19. 19.🎯 Nisha’s spam spotter is 50% accurate. If it is tested on 30 new messages, how many should it get right?
  20. 20.🎯 Tara’s leaf identifier is 70% accurate. If it is tested on 10 new leaf photos, how many should it get right?
  21. 21.📋 Planning an AI project: which comes first — calculate percent right or recheck every label? (a) calculate percent right (b) recheck every label
  22. 22.⚖️ 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?
  23. 23.❌ Aarav’s fruit sorter was tested on 40 new fruit photos and got 34 right. How many did it get wrong?
  24. 24.🎯 Meera’s handwriting reader was tested on 4 new handwritten letters and got 2 right. What is its accuracy in percent?
  25. 25.❌ Vihaan’s spam spotter was tested on 23 new messages and got 16 right. How many did it get wrong?
  26. 26.📦 Vihaan collected 120 labelled bird songs for a bird-song app and keeps one fifth of them for testing. How many are left for training?
  27. 27.📋 Planning an AI project: which comes first — tag each photo by type or train the model? (a) tag each photo by type (b) train the model
  28. 28.📋 Planning an AI project: which comes first — train the model or test on new photos? (a) train the model (b) test on new photos
  29. 29.🎯 Ishaan’s fruit sorter was tested on 20 new fruit photos and got 19 right. What is its accuracy in percent?
  30. 30.🧪 Why must you test a model on examples it has NOT seen? (a) to save paper (b) to make it faster (c) to see if it learned (d) to make it bigger
  31. 31.⚖️ Two fruit sorter models were tested on the same 10 fruit photos. Model A got 10 right and Model B got 7 right. How many percentage points more accurate is Model A?
  32. 32.📋 Planning an AI project: which comes first — pick a question to solve or correct bad labels? (a) pick a question to solve (b) correct bad labels
  33. 33.📋 Planning an AI project: which comes first — pick a question to solve or collect fruit photos? (a) pick a question to solve (b) collect fruit photos
  34. 34.⚖️ Two fruit sorter models were tested on the same 50 fruit photos. Model A got 43 right and Model B got 38 right. How many percentage points more accurate is Model A?
  35. 35.📋 Planning an AI project: which comes first — set aside test photos or let it learn patterns? (a) set aside test photos (b) let it learn patterns
  36. 36.📋 Planning an AI project: which comes first — improve data, retest or split train and test? (a) improve data, retest (b) split train and test
  37. 37.📋 Planning an AI project: which comes first — calculate percent right or split train and test? (a) calculate percent right (b) split train and test
  38. 38.🧪 You can plan a simple AI project with… (a) only a big robot (b) paper and examples (c) nothing at all (d) a secret password
  39. 39.🎯 Arjun’s bird-song app was tested on 10 new bird songs and got 10 right. What is its accuracy in percent?
  40. 40.📋 Planning an AI project: which comes first — collect fruit photos or tag each photo by type? (a) collect fruit photos (b) tag each photo by type

Answer key

  1. tag each photo by type
  2. 100
  3. 80
  4. work out the accuracy
  5. correct ÷ total × 100
  6. 10
  7. test on new photos
  8. 10
  9. 4
  10. more labelled examples
  11. 10
  12. try unseen examples
  13. 18
  14. 12
  15. tag each photo by type
  16. 56
  17. 144
  18. 80
  19. 15
  20. 7
  21. recheck every label
  22. 4
  23. 6
  24. 50
  25. 7
  26. 96
  27. tag each photo by type
  28. train the model
  29. 95
  30. to see if it learned
  31. 30
  32. pick a question to solve
  33. pick a question to solve
  34. 10
  35. set aside test photos
  36. split train and test
  37. split train and test
  38. paper and examples
  39. 100
  40. collect fruit photos

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