0(a) Enumerator The person who collects data by conducting an enquiry or an investigation is called enumerator. Often the enumerator is a trained person for field work.
(b) Investigator The person who plans and conducts the statistical investigation independently or with the help of others is called investigator.
Respondent The person who answers/responds to the set of questions is called respondent.
Recently you have seen the television coverage on exit polls before the results of Lok Sabha election 2014, which sampling technique is used in such cases and how does it work?
Random sampling technique is used for exit polls. A random sample of voters who exit the polling booths are asked for whom they voted. On the basis of the data collected therefore the predication is made.
