Description
Economics handwritten notes class 11th economics chapter 2- Collection of Data(Statistics) WITH IMPORTANT STAR MARKED AND HIGHLIGHTED TOPICS
Purpose of data collection
Sources of data collection
Primary and Secondary data
Modes of primary data collection
1) Personal interviews
2) Information through questionnaires and schedules
3) Telephonic interviews
Collection of secondary data
Two sources of secondary data collection- published and unpublished sources
Precautions to be undertaken in the use of secondary data
Two important sources of secondary data- Census of India and NSSO Reports
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