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Primary data are measurement observed and recorded as part of an original study. When the data required for a particular study can be found neither in the internal records of the enterprise nor in published sources, it may become necessary t collect original data, i.e., to conduct first hand investigation. The work of collecting original data is usually limited by time, money and man power available for the study.// 

There are two basic methods of obtaining primary data, namely:/

1.Questioning 
2.Observation

Questioning as the name suggests, is distinguished by the fact that data are collected by asking questions from people who are thought to have the desired information. 
Question may be asked in person or in writing. A formal list of such questions is called a questionnaire.