Collection of Data | Chapter 2 | Introduction | Class 11 | ONE SHOT
Rajat Arora・2 minutes read
The chapter discusses the collection, organization, and presentation of data in statistics, emphasizing the importance of primary data collected directly from the source for accuracy and reliability. Different methods of collecting data, such as questionnaires and personal investigations, have their own merits and drawbacks, impacting factors like originality, accuracy, cost, and efficiency.
Insights
- Primary data, collected directly from the source, is deemed more original, accurate, and reliable compared to secondary data, which is obtained from previous collections.
- Secondary data, sourced from publications like government reports and research institutions, includes vital information from sources like the Census of India and NSSO, offering comprehensive data on population, economic activities, and social aspects.
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Recent questions
What is the difference between primary and secondary data?
Primary data is collected directly from the source, while secondary data is obtained from previous collections.
What are the different modes of collecting data?
Direct Personal Investigation and Indirect Oral Investigation are common methods.
What are the drawbacks of the mailing method for data collection?
Lack of interest from recipients, inflexibility in changing responses, and limited use due to requiring educated respondents.
What are some important sources of secondary data?
Government publications, trade associations, research institutions, Census of India, and NSSO.
What are the qualities of a good questionnaire?
Limited number of simple questions in proper order, avoiding undesirable or controversial questions.
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