Class 11 Economics - BIHAR
Collection of Data
The chapter 'Collection of Data' in Class 11 Economics is fundamental for understanding how statistical information is gathered before analysis. It introduces students to primary and secondary data, methods of collecting primary data like personal interviews and questionnaires, and sources of secondary data such as published government reports and websites. Students also learn about the Census and Sample surveys, including the National Sample Survey Organisation (NSSO) and Census of India. Mastering this chapter is crucial for BSEB exams as it forms the theoretical foundation for practical statistics problems and frequently features in both objective and short-answer questions.
Start Learning FreeKey Concepts
Primary Data
Data collected for the first time by the investigator himself for a specific research purpose, making it original and first-hand.
Secondary Data
Data that has already been collected, processed, and published by someone else for some other purpose, making it readily available and economical.
Census Method
A method of statistical enquiry where data is collected from every single unit or element of the entire population or universe.
Sample Survey
A method of investigation where data is collected from only a representative part (sample) of the population to draw conclusions about the whole.
Pilot Survey
A small-scale preliminary test conducted before the main survey to check the questionnaire's effectiveness and identify potential flaws.
Important Formulas
Board Exam Info
In the Bihar Board (BSEB) Class 11 Economics examination, this chapter typically carries around 6 to 8 marks. Questions usually include multiple-choice questions (MCQs), very short answer questions distinguishing between primary and secondary data, and short answer questions explaining methods of data collection or the difference between census and sample surveys.
Frequently Asked Questions
What is the main difference between primary and secondary data?
Primary data is original and collected first-hand by the researcher for a specific study, whereas secondary data is already collected and published by someone else for another purpose.
When should we prefer the sampling method over the census method?
The sampling method is preferred when the population size is very large, the budget and time are limited, and a high degree of absolute accuracy is not strictly required.
What are the major agencies in India that collect secondary data?
The major agencies include the Census of India, the Central Statistics Office (CSO), the National Sample Survey Office (NSSO), and Reserve Bank of India (RBI) publications.
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