Methods-of-data-collection-and-presentation.pptx

Sampling-Techniques on biostat

1. Methods of data collection and presentation

2. INTRODUCTION Data collection is a term used to describe a process of preparing and collecting data Systematic gathering of data for a particular purpose from various sources, that has been systematically observed, recorded, organized. Data are the basic inputs to any decision-making process in any fields like education, business, industries, etc.

3. Collection The purpose of data collection is… To obtain information To keep on record To make decisions about important issues To pass information on to others

4. CLASSIFICATION OF DATA TYPES PRIMARY DATA SECONDARY DATA

5. PRIMARY DATA The data which are collected from the field under the control and supervision of an investigator It is the original data that has been collected specially for the purpose in mind This type of data are generally afresh and collected for the first time It is useful for the current studies as well as for future studies Example: Own questionnaire

6. PRIMARY RESEARCH METHODS & TECHNIQUES

7. ADVANTAGES AND DISADVANTAGES OF PRIMARY DATA ADVANTAGES High accuracy of data Data interpretation is better More flexible Address as specific research issues Up to Dated DISADVANTAGES High cost Time consuming Not available immediately Inaccurate feed-backs Rejection by some respondents/not taken seriously Required lot of skills with labor

8. SECONDARY DATA Data gathered and recorded by someone else prior to and for a purpose other than the current project It is the data that has been collected for another purpose It involves less cost, time and effort Secondary data is data that is being reused. Usually in a different context Example: Data From a book

9. ADVANTAGES AND DISADVANTAGES OF SECONDARY DATA ADVANTAGES Quick and cheap Wider geographical area Longer orientation period Leading to find primary data DISADVANTAGES Quality of Research Not Specific to Researcher’s Needs Incomplete Information Not Timely Poor availability in some cases

10. Characteristics of secondary data Reliability of data Suitability of data Adequacy of data

11. FACTORS TO CONSIDER IN SELECTION OF APPROPRIATE METHOD FOR DATA COLLECTION Nature, scope and object of enquiry Availability of funds Time factor Precision required