Data is collected from primary or secondary sources through surveys, and the choice of census, sample and method decides how reliable the data is. Class 11 Economics Chapter 2 Collection of Data builds this idea step by step. These class 11 economics handwritten notes chapter 2 Collection of Data follow the 2026-27 NCERT and cover meaning and purpose.
- CBSE Class 11 Weightage: a scoring chapter in the Economics paper, asked in short and long answers.
- What the notes cover: meaning and purpose of collecting data, primary and secondary sources of data, framing a good questionnaire, modes: personal, mailing and telephone interviews.
- Best for: quick revision before Class 11 exams and a base for CUET later.
You can read the complete class 11 economics handwritten notes for Collection of Data, with key terms, boxed definitions, and quick revision points, in the PDF below.
These handwritten notes are written by subject teachers, mapped to the 2026-27 NCERT, and checked against the last five years of CBSE Class 11 Economics papers.
Key Terms and Ideas in Collection of Data
These are the terms and ideas the exam asks about most. Learn each one so you can define it and use it in your answers.
| Term / Idea | What it means |
|---|---|
| Data | economic facts stated as numbers that help understand a problem |
| Primary data | data collected first hand by the researcher through an enquiry |
| Secondary data | data already collected and processed by another agency |
| Census | a survey that covers every unit of the whole population |
| Sample | a small representative part chosen from the population |
| Random sampling | picking units by chance so each has an equal chance |
| Sampling error | the gap between the sample estimate and the true value |
| Questionnaire | the set of questions used as the instrument in a survey |
What the Collection of Data Handwritten Notes Cover
This chapter explains how we collect data for economic study. It covers the sources of data and the modes of collecting it. It also compares census with sample surveys and the errors that can arise.
- Meaning and purpose of collecting data
- Primary and secondary sources of data
- Framing a good questionnaire
- Modes: personal, mailing and telephone interviews
- Census and sample surveys
- Random and non-random sampling
- Sampling and non-sampling errors, Census of India and NSSO
Collection of Data Topic-wise Weightage for CBSE Class 11 Economics
Some parts of this chapter are asked more often than others. The table below shows which sub-topics to revise first, based on recent CBSE Class 11 question trends.
| Sub-topic | Weightage | CBSE Frequency |
|---|---|---|
| Primary vs secondary data | High | asked often |
| Census vs sample survey | High | asked often |
| Framing a good questionnaire | Medium | asked sometimes |
| Sampling and non-sampling errors | Medium | asked sometimes |
| Random vs non-random sampling | Low | asked rarely |
How Collegedunia's Handwritten Notes Help You Revise Collection of Data
These notes are made for the night before the exam. They keep the facts short and easy to scan. Collegedunia maps every point to the 2026-27 NCERT.
- Clear handwriting: each topic is written in neat, easy-to-read handwriting.
- Boxed key terms: the main terms and definitions are boxed by hand for fast recall.
- Diagrams and tables: simple hand-drawn tables and charts make ideas clear.
- Colour-coded headings: new sub-topics stand out, so you find any section in seconds.
Collection of Data Self-Assessment Quiz
Try these quick questions after you read the notes. Tap each question to check your answer. They cover the points CBSE asks most often.
Data collected first hand by the researcher is called:
(a) secondary (b) primary (c) census (d) sample
Answer: (b) primary - it is based on first hand information
A survey covering every unit of the population is a:
(a) sample (b) pilot (c) census (d) quota
Answer: (c) census - it is complete enumeration
In random sampling every unit has:
(a) no chance (b) an equal chance (c) a fixed rank (d) a chosen place
Answer: (b) an equal chance - selection is by chance, the lottery method
Which error is more serious?
(a) sampling (b) non-sampling (c) both equal (d) neither
Answer: (b) non-sampling - it does not shrink with a larger sample
The instrument most used in a survey is the:
(a) graph (b) table (c) questionnaire (d) index
Answer: (c) questionnaire - it holds the questions for the survey
How to Use These Handwritten Notes for Class 11 Economics Revision
Use these class 11 economics handwritten notes in two passes. Read them slowly once for the full chapter. Then, near the exam, read only the boxes and key terms for a fast recall.
- Read the notes once with the NCERT chapter open beside you.
- Say each key term and idea in your own words.
- Practise one long-answer question from a past paper.
- On the last day, revise only the key terms and the boxes.
Class 11 Economics Handwritten Notes for All Chapters
The table below links the class 11 economics handwritten notes for every chapter. Use it to jump to any other chapter's notes.
Collection of Data Class 11 Economics Handwritten Notes FAQs
Ques. Where can I download Collection of Data Class 11 Economics Handwritten Notes PDF?
Ans. You can download the Collection of Data Class 11 Economics Handwritten Notes PDF directly from this page. Both the Normal and HD versions are free.
Ques. Are these handwritten notes aligned with the 2026-27 NCERT?
Ans. Yes. These notes follow the current 2026-27 syllabus for Class 11 Economics. Difference between primary and secondary data for a Class 11 student
Ques. How many pages is the Class 11 Economics Collection of Data Handwritten Notes PDF?
Ans. The notes run about 22 pages. They cover the full chapter with key terms, hand-drawn boxes, and a short self-assessment quiz.
Ques. What is the main idea of the 11th standard Economics chapter Collection of Data?
Ans. Primary data is collected first hand by the researcher through a fresh enquiry. Secondary data is data already collected and processed by another agency and then reused.
Ques. Are these Collection of Data notes enough for the CBSE Class 11 exam?
Ans. Yes, for revision. The Collegedunia handwritten notes cover every key point and exam term. Read them with the NCERT chapter and practise past questions.
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