Unit 1: Statistical Description of Data (Part 2)

2. UNIT 1: Statistical
Description of
Data
PART - II

4. Introduction
to Statistical
Investigation

5. Important stage in statistical investigation
Planning Execuation

7. • The process of counting or enumerating and
recording the same systematically is called
“Collection of data”.
• Census or Sample technique is adopted in
collecting the “Primary” data. The Collected raw
data is edited and scrutinized by detecting the
errors and omitting the irrelevant and inconsistent
information.

8. Sources of Collecting the
data

9. Primary Sources
• The data which are originally collected for the first
time are called as “Primary Data”.

10. Types of primary data

11. Direct
personal
inteview

12. Indirect oral
interview

13. Local
Agencies

14. Observation

15. Questionnaires

16. Schedules

17. Secondary Sources
• Published books
• Journals
• Internet
• News papers
• Articles

18. Techniques of
Collecting
Census
Method
Sample
Method

21. Objectives of
classification
1. To eliminate unnecessary detail of the data.
2. To convert the raw data into an organised data.
3. To present the complex data into a simple form.
4. To bring out similarity and dissimilarity in the
items.
5. To bring in uniformity among the facts.
6. To present the data in a condensed form.
7. To establish relationship between the two series.

22. TYPES OF CLASSIFICATION
Qualitative (Descriptive / Attributes)
Simple
Composite
Arbitrary
Quantitative (Numerical / Variables)
Discrete
Continuous

23. THANK YOU