Economics handwritten notes class 11th economics chapter 2- Collection of Data(Statistics)

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Two sources of secondary data collection- published and unpublished sources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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