statistical data must be obtained from with reasonable degree of accuracy
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Statistical data should be done via reasonable standard of accuracy and whenever we conduct a statistical survey, we have to define very clearly the degree of accuracy.
How to measure accuracy and how to make approximation so that desired level of accuracy can be achieved? Some facts to be kept in mind while conducting statistical surveys are the errors which creep in at various stages.
These errors may occur due to inaccurate measurements, inappropriate methods, approximations of figures, the chance factor associated with selection of sample units, etc.
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