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Which of the following terms best describes data that were originally collected at an earlier time by a different person for a different purpose ?

  • A.Primary data
  • B.Secondary data
  • C.Tertiary data
  • D.Field study note

Answer: B

Data first collected by someone else, at another time and for another purpose, are secondary data.

In research methodology the distinction turns on who collected the data and why. Primary data are gathered first-hand by the researcher for the study in hand, through a survey, interview, experiment or observation. When a researcher reuses census tables, published statistics or another study's dataset, the data are secondary for that researcher.

Primary data is therefore the opposite case. 'Tertiary data' is not a standard category in research methods (tertiary is used for sources such as bibliographies and guides), and a field study note is a primary record made by the researcher during field work.

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