Collection of Data | Sources of Data | Mode of Data Collection | Chapter 2 | Class XI, XII
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Collection of Data | Sources of Data | Mode of Data Collection | Chapter 2 | Class XI, XII
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00:00 Data01:02 Sources of Data - Primary Data and Secondary Data02:15 Preparation of Instrument04:00 Open Ended Question (Unstructured Question) and Closed Ended Question (Structured Question)04:56 Mode of Data Collection - Personal Interview, Telephonic Interview, Mailed Interview05:59 Pilot Survey
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