Questions that have a predetermined set of answers from which respondents select one. Tend to produce qualitative data.
Primary data
Information observed or collected directly from first-hand experience.
Qualitative data
Non-numerical data.
Quantitative data
Data measured in numbers.
Questionnaire
Data are collected through the use of written questions.
Secondary data
Information used in a research study that was collected by someone else or for a purpose other than the current one, such as published data or data collected in the past.
