Question
Which of the following methods give better results and why?
  1. Census.
  2. Sample.

Answer

  1. Census: Census method refer to inclusion of all items in the field of statistical enquiry and sample methods refer to selection of few items as representatives of all the items.
  2. Sample: Sample method gives better results than census method because of following reasons:
  • Economical method: Census method requires huge expenditure. As a large number of enumerators have to be employed. They have to be trained. Their work has to be coordinated and supervised. There will be expenditure on traveling, food etc in case of census method. The cost of the survey is much smaller if we a sample method because of less efforts involved in it.
  • Less time and efficiency consumption: The collection of data, the tabulation, and analysis take much less time in case of sampling method compared to census method. In fact the population census of India takes so much time that it takes place only once in ten years.
  • Accuracy: In sampling method it is possible to check the extent or errors and take corrective actions. While in census method, it is almost impossible to detect errors, owing to its large magnitude.
  • Less non-sampling errors: The magnitude of non- sampling errors is also much smaller in case of sampling method because of smaller size of data.
  • More reliable: In sampling method scientific methods and trained investigators are employed for the collection of data, which make it more reliable than census method.

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