myCBSEguide App
Download the app to get CBSE Sample Papers 2024-25, NCERT Solutions (Revised), Most Important Questions, Previous Year Question Bank, Mock Tests, and Detailed Notes.
Install NowCBSE Economics Chapter 2 Collection of Data class 11 Notes Economics in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Collection of Data class 11 Notes Economics latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 11 Economics notes on Chapter 2 Collection of Data class 11 Notes Economics are also available for download in CBSE Guide website.
CBSE Guide Collection of Data class 11 Notes
CBSE guide notes are the comprehensive notes which covers the latest syllabus of CBSE and NCERT. It includes all the topics given in NCERT class 11 Economics text book. Users can download CBSE guide quick revision notes from myCBSEguide mobile app and my CBSE guide website.
Collection of Data class 11 Notes Economics
Download CBSE class 11th revision notes for Chapter 2 Collection of Data class 11 Notes Economics in PDF format for free. Download revision notes for Collection of Data class 11 Notes Economics and score high in exams. These are the Collection of Data class 11 Notes Economics prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.
Download Revision Notes as PDF
CBSE Class 11 Economics
Revision Notes
Chapter – 2
COLLECTION OF DATA
Data is a collection of facts and measurement.
Data is a tool which helps in reaching a sound conclusion by providing information therefore. For statistical investigation, collection of data is the first and foremost.
Sources of Data
1. Primary Source
2. Secondary Sources
a. Published sources
b. Un-published sources
Primary Data– Data originally collected in the process of investigation are known as primary data. This is original form of data which are collected for the first time.It is collected directly from its source of origin.
Methods of collecting primary data
There are three basic ways of collecting data :
(i) Personal interview OR Direct Personal Investigation
(ii) Mailing (questionnaire surveys)
(iii) Telephone interviews
(iv) Indirect verbal investigation
(v) Information from local sources
(vi) Enumerator method
Secondary data It refers to collection of data by some agency, which already collected the data and processed. The data thus collected is called secondary data.
Point of difference between Primary and Secondary data :-
1. Accuracy,
2. Originality,
3. Cost,
4. Need of modification
BASIS FOR COMPARISON | PRIMARY DATA | SECONDARY DATA |
Meaning | Primary data refer to the first hand data gathered by the researcher himself. | Secondary data means data collected by someone else earlier. |
Data | Real time data | Past data |
Process | Very involved | Quick and easy |
Source | Surveys, observations, experiments, questionnaire, personal interview, etc. | Government publications, websites, books, journal articles, internal records etc. |
Cost effectiveness | Expensive | Economical |
Collection time | Long | Short |
Specific | Always specific to the researcher’s needs. | May or may not be specific to the researcher’s need. |
Accuracy and Reliability | More | Relatively less |
Sources of secondary data
Published sources
1. Govt. publication
2. semi-Govt. Publication
3. Reports of committees & commissions
4. Private publications e.g., Journals and News papers research institute, publication of trade association.
5. International publications
Unpublished Sources
The statistical data needn’t always be published. There are various sources of unpublished statistical material such as the records maintained by private firms, business enterprises, scholars, research workers, etc. They may not like to release their data to any outside agency.
Other source : web-site
Important points to be kept in mind while drafting the questionnaire
A. Introduction and purpose of investigation
B. Reasonable number questions.
C. Questions should be small & clear.
D. Questions should be arranged logically.
E. Instructions should be clear.
F. Proper space for answer.
G. Questions should be relevant to the investigation.
H. Personal questions should be avoided.
I. Avoid questions of calculations.
J. Cross Verification.
H. The question should not be ambiguous.
I. The question should not use double negative like “don’t you”.
J. The question should not indicate alternative answers.
Pilot Survey: Before sending the questionnaire to the information. It should be pretested. As a result of its short comings if any, can be removed. Such pretesting named as pilot survey.
A pilot survey is a preliminary survey used to gather information prior to conducting a survey on a larger scale. Pilot surveys, typically taken by smaller groups, help determine the efficiency of the future survey while also helping organizations smooth out difficulties before administering the main survey.
Methods of sampling:
1. Random sampling
a. Simple or unrestricted random sampling
b. Restricted random sampling
i. Stratified
ii. systematic
iii. multistage or cluster sampling
2. Non-Random Sampling
a. Judgment sampling
b. Quota sampling
c. Convenience sampling
Census survey : In this method every element of population is included in the investigation.
Sample survey : In this method a group of units representing all the units of the population is investigated.
BASIS FOR COMPARISON | CENSUS | SAMPLING |
Meaning | A systematic method that collects and records the data about the members of the population is called Census. | Sampling refers to a portion of the population selected to represent the entire group, in all its characteristics. |
Enumeration | Complete | Partial |
Study of | Each and every unit of the population | Only a handful of units of the population. |
Time required | It is a time consuming process. | It is a fast process. |
Cost | Expensive method | Economical method |
Results | Reliable and accurate | Less reliable and accurate, due to the margin of error in the data collected. |
Error | Not present. | Depends on the size of the population |
Appropriate for | Population of heterogeneous nature. | Population of homogeneous nature. |
Population or universe
In Statistics, population or universe simply refers to an aggregate of items to be studied for an investigation.
Sample: A group of items taken from the population for investigation and representative of all the items.
Sampling Errors: Sampling error is the difference between the result of studying a sample and the result of the census of the whole population.
Non-Sampling Error: Can occur in any type of survey whether it be a census or sample survey.
Sampling errors
1. Biased errors
2. Unbiased errors
Non sampling errors
1. Error in data acquisition
2. Non Response error
3. Sampling Bias
Census of India and National Sample Survey Organization:
The census of India provides the complete and continuous demographic record of population.
The NSSO was established by the Govt. of India to conduct nation wide survey on socio-economic issues like employment, literacy, maternity, child care, utilisation of public distribution system etc.
The data-collected by NSSO survey are released through reports and its quarterly journal ‘’Sarvekshana’’.
Eg. Size, growth rate, distribution of population, density, population, projections, sex composition and literacy.
These data are used by govt. of India for planning purpose.
Collection of Data class 11 Notes
- CBSE Revision notes (PDF Download) Free
- CBSE Revision notes for Class 11 Economics PDF
- CBSE Revision notes Class 11 Economics – CBSE
- CBSE Revisions notes and Key Points Class 11 Economics
- Summary of the NCERT books all chapters in Economics class 11
- Short notes for CBSE class 11th Economics
- Key notes and chapter summary of Economics class 11
- Quick revision notes for CBSE exams
CBSE Class-11 Revision Notes and Key Points
Collection of Data class 11 Notes Economics. CBSE quick revision note for class-11 Mathematics, Physics, Chemistry, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.
- Revision Notes for class-11 Physics
- Revision Notes for class-11 Chemistry
- Revision Notes for class-11 Mathematics
- Revision Notes for class-11 Biology
- Revision Notes for class-11 Accountancy
- Revision Notes for class-11 Economics
- Revision Notes for class-11 Business Studies
- Revision Notes for class-11 Computer Science
- Revision Notes for class-11 Informatics Practices
- Revision Notes for class-11 Geography
To download Collection of Data class 11 Notes, sample paper for class 11 Chemistry, Physics, Biology, History, Political Science, Economics, Geography, Computer Science, Home Science, Accountancy, Business Studies and Home Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through the best app for CBSE students and myCBSEguide website.
- Introduction class 11 Notes Economics
- Organisation of Data class 11 Notes Economics
- Presentation of Data class 11 Notes Economics
- Measures of Central Tendency class 11 Notes Economics
- Measures of Dispersion class 11 Notes Economics
- Correlation class 11 Notes Economics
- Introduction to Index Number class 11 Notes Economics
- Indian Economy on the Eve of Independence class 11 Notes Economics
- Indian Economy 1950-1990 class 11 Notes Economics
- Economic Reform Since 1991 class 11 Notes Economics
- Poverty class 11 Notes Economics
- Human Capital Formation in India class 11 Notes Economics
- Rural Development class 11 Notes Economics
- Employment : Growth, Informalisation and Other Issues class 11 Notes Economics
- Infrastructure class 11 Notes Economics
- Environment and Sustainable Development class 11 Notes Economics
- Inflation Problem and Policies class 11 Notes Economics
- Development Experience Of India a Comparison with Neighbours class 11 Notes Economics
Test Generator
Create question paper PDF and online tests with your own name & logo in minutes.
Create NowmyCBSEguide
Question Bank, Mock Tests, Exam Papers, NCERT Solutions, Sample Papers, Notes
Install Now
Its best aap for students