Primary data sources include; Surveys, observations, experiments, questionnaires, focus groups, interviews, etc., while secondary data sources include; books, journals, articles, web pages, blogs, etc. ... Secondary data, on the other hand, do not require interaction with the subject of study before it can be collected.

Is a questionnaire primary or secondary?

Primary data collection sources include surveys, observations, experiments, questionnaire, personal interview, etc. On the contrary, secondary data collection sources are government publications, websites, books, journal articles, internal records etc.

What kind of data is a questionnaire?

The questionnaires can measure both qualitative and quantitative data, but is it more appropriate for quantitative data collection. In structured interviews the questions as well as their order is already scheduled.