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Revision Notes

Collection of Data

Gujarat Board · Class 11 · Statistics

Quick revision notes for Collection of Data — Gujarat Board Class 11 Statistics. Key concepts, formulas, and definitions for last-minute revision.

45 questions25 flashcards5 concepts

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Key Topics to Revise

1

Origin and Growth of Statistics

  • Indian contribution to statistics dates back to Mauryan Empire (321-296 BC)
  • Abu Fazal's 'Ain-I-Akbari' (1596-97 AD) described advanced statistical systems during Akbar's reign
  • German word 'Statistik' first used by Gottfried Achen Wall in 1749
2

Types of Data: Qualitative vs Quantitative

  • Variable characteristics can be measured numerically (quantitative) or observed non-numerically (qualitative)
  • Qualitative data deals with attributes that cannot be measured on a scale
  • Quantitative data deals with numerical variables that can be measured
3

Primary vs Secondary Data

  • Primary data: Originally collected for the first time by authorized agency/investigator
  • Secondary data: Data collected by others and reused by current investigator
  • Primary data is original and obtained from units under inquiry
4

Methods of Collecting Primary Data

  • Three main methods: Direct Inquiry, Indirect Inquiry, Method of Questionnaire
  • Direct Inquiry: Investigator personally visits field and collects information
  • Indirect Inquiry: Information obtained through third party when direct contact not possible

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Full Notes

Key Concepts

Statistics is the science that dealsQualitative data represents nonData originally collected by authorized agenciesData that was previously collected byThe investigator or enumerator personally visits

Frequently Asked Questions

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Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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