Class 11 Economics - GUJARAT
Collection of Data
The chapter 'Collection of Data' in Class 11 Economics introduces students to the foundational steps of statistical analysis. It covers the primary and secondary sources of data, methods of collecting data such as interviews, questionnaires, and observation, and the distinction between a census and a sample survey. Understanding this chapter is crucial for board exams as it builds the practical base for conducting economic surveys, drafting questionnaires, and understanding data reliability. Mastering these concepts helps students score high in both objective and subjective questions in the Gujarat Board (GSEB) examinations.
Start Learning FreeKey Concepts
Primary Data
Data collected for the first time by the investigator himself for a specific purpose, making it original in character.
Secondary Data
Data that has already been collected, processed, and published by someone else for some other purpose.
Census Method
A method of statistical enquiry where data is collected from each and every unit of the population or universe.
Sample Survey Method
A method where data is collected from only a representative group (sample) chosen from the entire population to save time and cost.
Pilot Survey
A preliminary test of the questionnaire on a small group of respondents to check its effectiveness and remove errors before the actual survey.
Important Formulas
Board Exam Info
In the Gujarat (GSEB) Class 11 Economics board exams, this chapter typically carries around 6 to 8 marks. Questions frequently include short notes on primary vs. secondary data, merits and demerits of census and sample methods, and designing a good questionnaire.
Frequently Asked Questions
What is the main difference between primary and secondary data?
Primary data is original and collected firsthand by the investigator, whereas secondary data is already collected and published by someone else.
When should we prefer a sample survey over a census survey?
A sample survey is preferred when the population size is very large, when the units are homogenous, or when there are strict limitations of time, money, and labor.
What are the essential qualities of a good questionnaire?
A good questionnaire should have a limited number of questions, clear and simple language, logical sequence, and avoid personal or sensitive questions.
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