2. Collection of Data
The chapter elaborates on the collection of data, highlighting the significance of data collection methods, distinguishing between primary and secondary data, and the techniques of sampling. It delves into the different modes of data collection, including surveys, and emphasizes the role of census and sample surveys in accumulating statistical data for various analyses in economics.
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What we have learnt
- Data is vital for providing insights and forming sound conclusions.
- Understanding primary and secondary data is crucial for effective data collection.
- Surveys can be conducted through different methods such as personal interviews, mailing questionnaires, and telephone interviews.
Key Concepts
- -- Primary Data
- Information collected firsthand by the researcher for the specific purpose of the study.
- -- Secondary Data
- Data that has been collected and processed by someone else and is used by a researcher for analysis.
- -- Census
- A comprehensive collection of data on all individuals or units in a population, typically conducted every ten years.
- -- Sample
- A subset of the population selected for analysis, which should represent the larger group.
- -- Sampling Error
- The error that arises when a sample estimate deviates from the actual population parameter.
- -- NonSampling Errors
- Errors that occur not related to the sampling process, often arising from data collection methods or data recording.
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