Collection of Data · Class 11 Economics · Chapter 2
📈 Collection of Data (Statistics for Economics)
CBSE Class 11 Humanities & Commerce · Economics · Chapter 1
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📖Notes Deck
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Download PDF →Top question patterns · CBSE annual / SQP aggregate
| 85% | Distinguish primary vs secondary data — Two columns: originality, collection, cost/time, suitability. Example: survey vs Census/NSSO. | 4 MARKS |
| 75% | Methods of collecting primary data — Name 4-6 methods; for each give one line + one merit/demerit. Contrast questionnaire vs schedule. | 4 MARKS |
| 80% | Census method vs sample method — Coverage, cost/time, accuracy, errors. Census of India = census; NSSO = sample. | 4 MARKS |
| 60% | Sampling vs non-sampling errors — Sampling = part-of-whole, falls with size, sample only. Non-sampling = process faults, both methods. | 4 MARKS |
| 45% | Qualities of a good questionnaire / pilot survey — Short, simple, unambiguous, logical, no leading/personal Qs; pilot = trial run before main survey. | 3 MARKS |
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