# COLLECTION OF DATA

Statistics for Economics Chapter 2: Collection of Data Mind Map

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COLLECTION OF DATA

## 1. SOURCES OF COLLECTION OF DATA

### 1.1. Primary source -collection of data from its source of origin

1.1.1. Primary data - data collected by the investigator for his own purpose, for the first time.

### 1.2. Secondary source - implies collection of data from some agency or institution which already happens to have collected the data through statistical surveys

1.2.1. secondary data - data which has already been collected, for some other purpose than the answering of the question in hand.

### 1.3. Difference of:

1.3.1. Originality

1.3.2. Objective

1.3.3. Cost of Collection

1.3.4. According to Secrist - "The distinction between primary & secondary data is one of the degree. First & second."

## 2. BASIC DATA COLLECTION: SOME STATISTICAL METHODS/MODES OF DATA COLLECTION

### 2.1. Personal Interviews

2.1.1. Direct Personal Investigation

2.1.2. Indirect Oral Investigation

2.1.3. Information from Local Sources and Corresponadances

### 2.2. Information through questionnairs and Schedules

2.2.1. Mailing

2.2.2. Enumerator's Method

### 2.4. Constructions of Questionnairs & Surveys.

2.4.1. Quality of Good Questionnairs

2.4.1.1. Limited no. of Qs

2.4.1.2. Simplicity

2.4.1.3. Proper Order

2.4.1.4. No Undesirable Qs

2.4.1.5. Non-Cotroversial

2.4.1.6. Calcuations to be Avoided

2.4.1.7. Pre-testing Pilot Surveys

2.4.1.8. Clear Instructions

2.4.1.9. Cross Verifications

2.4.1.10. Request for Return

2.4.2. Types of Questons

2.4.2.1. Simple Alt Qs (Y/N)

2.4.2.2. MCQs

2.4.2.3. Specific Info Qs

2.4.2.4. Open Qs (for opinons)

2.4.3. Pilot Surveys

2.4.4. Difference: Info is recorded by the respondents in the Questionnairs, whereas by enumerators in Surveys

## 3. COLLECTION OF SECONDARY DATA

### 3.1. Published Sources

3.1.1. Govt. Publications

3.1.1.1. RGI (Registrar General of India)

3.1.1.2. DGCIS (Directorate General of Commercial Intelligence & Statistics)

3.1.1.3. Labour Bureau

3.1.1.4. NSSO

3.1.2. Semi-Govt. Publications

3.1.2.1. Municipalities

3.1.2.2. Metropolitan Councils

3.1.3. Reports of Committees & Commissions

3.1.3.1. Planning Commisssion

3.1.3.2. Finance Commission

3.1.3.3. Monopolies Commission

3.1.4.1. Sugar Mills Association

3.1.5. Publications of Research Institutions

3.1.5.1. Indian Statistical Institute

3.1.5.2. National Council of Applied Economic Research

3.1.6. Journals & Papers

3.1.6.1. The Economic Times

3.1.6.2. Commerce Facts for You

3.1.7. Publications of Research Scholars

3.1.8. International Publications

3.1.8.1. UNO

3.1.8.2. IMF ( International Monetary Fund)

3.1.8.3. World Bank

3.1.8.4. ILO (International Labour Associations)

3.1.8.5. Foreign Govts.

### 3.3. Precautions in the Use of Secondary Data

3.3.1. Ability of Collecting Org

3.3.2. Objective & scope

3.3.3. Method of Collection

3.3.4. Time & Conditions of Collection

3.3.5. Unit Measurement Differances

3.3.6. Accuracy

### 3.4. Two Imp Sources Of Secondary Data

3.4.1. Cencus; Publishd by Registrar general & Census Commisioner. Includes Statistical info on the parameters of:

3.4.1.1. Size, Growth rate and Distribution of population in India

3.4.1.2. Population Projections

3.4.1.3. Density of population

3.4.1.4. Sex compoition of population

3.4.1.5. State of illiteracy

3.4.2. NSSO, under Ministry of Statistics and Programme Implementation. Offers information on the following parameters of economic change:

3.4.2.1. Land & Livestock Holdings

3.4.2.2. Employment & Unemployment Status

3.4.2.3. Consumer Expenditure

3.4.2.4. Sources of Household Income

## 4. ALL POSSIBLE MERITS AND DEMERITS THAT APPLY TO THE STATISTICAL METHODS FOR DATA COLLECTION

### 4.1. Merits

4.1.1. Originality

4.1.2. Accuracy

4.1.3. Reliability

4.1.4. Gain of related Information

4.1.5. Uniformity

4.1.6. Elastic

4.1.7. Wide Coverage

4.1.8. Less Expensive

4.1.9. Expert Opinion

4.1.10. Free from Bias

4.1.11. Simple

4.1.12. Continuity (regular supply of info)

4.1.13. Suitable for Special Purpose

4.1.14. Personal Contact

4.1.15. Completeness + Reliable

### 4.2. Demerits

4.2.1. Difficult to Cover Wide Areas

4.2.2. Personal Bias

4.2.3. Costly

4.2.3.1. Not Suitable for Private Surveys

4.2.4. Doubtful Conclusions

4.2.5. Delay in Collection

4.2.6. Lack of :

4.2.6.1. Accuracy

4.2.6.2. Originality

4.2.6.3. Uniformity

4.2.6.4. Interest

4.2.6.5. Flexibility

4.2.6.6. Suitable Enumerators

4.2.6.7. Time

4.2.7. Limited Use