Class 11 Economics - HARYANA
Collection of Data
The chapter 'Collection of Data' in Class 11 Economics explores the foundational step of statistical investigation. Students learn about the primary sources of data, such as direct personal investigation and mailing questionnaires, alongside secondary sources like published official reports and websites. It covers important concepts like population, sample, census method, and sampling methods, highlighting the difference between a complete enumeration and studying a representative part. Mastering this chapter is crucial for Haryana (BSEH) board exams because it forms the practical base for numerical problems and theoretical questions asked every year.
Start Learning FreeKey Concepts
Primary Data
Data originally collected for the first time by the investigator for a specific purpose, making it first-hand and original.
Secondary Data
Data that has already been collected, processed, and published by someone else for some other purpose and is now being used by the investigator.
Census Method
A method of statistical enquiry where data is collected about every single unit of the entire population or universe.
Sampling Method
A method where data is collected from only a selected representative group (sample) of the population to draw conclusions about the whole.
Pilot Survey
A preliminary trial survey conducted on a small scale before launching the actual large-scale survey to test the questionnaire and methods.
Important Formulas
Board Exam Info
In the Haryana (BSEH) Class 11 Economics exam, this chapter typically carries around 6 to 8 marks. Questions usually include short-answer differences between primary and secondary data, merits and demerits of sampling vs. census methods, and descriptive questions on preparing a good questionnaire.
Frequently Asked Questions
What is the main difference between primary and secondary data?
Primary data is original and collected first-hand by the investigator, whereas secondary data is already collected and published by someone else.
Why is sampling preferred over the census method?
Sampling is cost-effective, saves time, requires less labor, and is ideal when the population size is very large or infinite.
What are the essential qualities of a good questionnaire?
A good questionnaire should have limited questions, simple and clear language, logical sequence, and avoid personal or sensitive questions.
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