![]() ![]() Sample survey : In this method a group of units representing all the units of the population is investigated. Simple or unrestricted random samplingĬensus survey : In this method every element of population is included in the investigation. Pilot surveys, typically taken by smaller groups, help determine the efficiency of the future survey while also helping organizations smooth out difficulties before administering the main survey.Ī. Such pretesting named as pilot survey.Ī pilot survey is a preliminary survey used to gather information prior to conducting a survey on a larger scale. As a result of its short comings if any, can be removed. Pilot Survey: Before sending the questionnaire to the information. The question should not indicate alternative answers. The question should not use double negative like “don’t you”. Questions should be relevant to the investigation. Introduction and purpose of investigationĭ. Important points to be kept in mind while drafting the questionnaireĪ. They may not like to release their data to any outside agency. There are various sources of unpublished statistical material such as the records maintained by private firms, business enterprises, scholars, research workers, etc. The statistical data needn’t always be published. ![]() Private publications e.g., Journals and News papers research institute, publication of trade association. May or may not be specific to the researcher’s need.Ĥ. Government publications, websites, books, journal articles, internal records etc.Īlways specific to the researcher’s needs. Surveys, observations, experiments, questionnaire, personal interview, etc. Secondary data means data collected by someone else earlier. Primary data refer to the first hand data gathered by the researcher himself. Point of difference between Primary and Secondary data :. The data thus collected is called secondary data. Secondary data It refers to collection of data by some agency, which already collected the data and processed. (i) Personal interview OR Direct Personal Investigation There are three basic ways of collecting data : This is original form of data which are collected for the first time.It is collected directly from its source of origin. ![]() Primary Data– Data originally collected in the process of investigation are known as primary data. For statistical investigation, collection of data is the first and foremost. Download Revision Notes as PDFĭata is a collection of facts and measurement.ĭata is a tool which helps in reaching a sound conclusion by providing information therefore. Revising notes in exam days is on of the best tips recommended by teachers during exam days. The revision notes help you revise the whole chapter in minutes. These are the Collection of Data class 11 Notes Economics prepared by team of expert teachers. Download revision notes for Collection of Data class 11 Notes Economics and score high in exams. Collection of Data class 11 Notes Economicsĭownload CBSE class 11th revision notes for Chapter 2 Collection of Data class 11 Notes Economics in PDF format for free. Users can download CBSE guide quick revision notes from m圜BSEguide mobile app and my CBSE guide website. It includes all the topics given in NCERT class 11 Economics text book. CBSE Guide Collection of Data class 11 NotesĬBSE guide notes are the comprehensive notes which covers the latest syllabus of CBSE and NCERT. Class 11 Economics notes on Chapter 2 Collection of Data class 11 Notes Economics are also available for download in CBSE Guide website. The best app for CBSE students now provides Collection of Data class 11 Notes Economics latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations.
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