Class 11 Economics - ANDHRA-PRADESH
Collection of Data
The chapter 'Collection of Data' in Class 11 Economics introduces students to the foundational steps of statistical analysis. It covers the sources of data—primary and secondary—and details various methods of collecting them, such as personal interviews, mailed questionnaires, and telephonic interviews. Students learn about the Census and Sample methods of data collection, along with essential sampling techniques like random and non-random sampling. Understanding this chapter is crucial for Andhra Pradesh (BSEAP) board exams because it forms the basis for practical statistical problems and data interpretation questions frequently asked in both short and essay formats.
Start Learning FreeKey Concepts
Primary Data
Data collected for the first time by the investigator himself for a specific research purpose, making it original in character.
Secondary Data
Data that has already been collected, processed, and published by someone else for some other purpose, such as data from government reports or books.
Census Method
A method of statistical enquiry where data is collected from every single unit of the entire population or universe under study.
Sample Method
A method where data is collected from a small, representative subset of the population, saving time, cost, and effort.
Random Sampling
A sampling technique where every unit of the population has an equal and independent chance of being selected in the sample.
Pilot Survey
A small-scale preliminary test of the data collection questionnaire and methods conducted before the actual survey begins to identify any flaws.
Important Formulas
Board Exam Info
In the Andhra Pradesh (BSEAP) Class 11 Economics board examinations, this chapter typically carries around 6 to 8 marks. Questions usually include very short answer questions (VSAQ) defining primary and secondary data, short answer questions (SAQ) differentiating between census and sample methods, and sometimes essay questions explaining the various methods of collecting primary data.
Frequently Asked Questions
What is the main difference between primary and secondary data?
Primary data is original data collected first-hand by the investigator for a specific study, whereas secondary data is already existing data collected by someone else for a different purpose.
When is the Census method preferred over the Sample method?
The Census method is preferred when the population size is small, high accuracy is required, and there is a need for intensive study of every single unit.
What are the essential qualities of a good questionnaire?
A good questionnaire should have a limited number of questions, simple and clear language, logical sequencing of questions, and avoid personal or ambiguous questions.
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