Qualitative data
Qualitative data is provided by methods such as interviews and case studies which are not always reliable but they are valid. it is data describing meaning rather than statistics.
Quantitative data
Quantitative data is statistical, focusing on numbers rather than meaning and experience. it is gained through experimental approach like questionnaires and experiments which are easy to analyse as well as being fairly reliable.
Demographic data
demographic data is current statistical characteristics of a population, including fields such as: gender, race, age, disability, home ownership or employment.
Psychographic data
Psychographic data from individuals or communities can be valuable in the fields of marketing, demographics, opinion research and social research in general. they can be contrasted with demographic variables (such as age and gender), behavioural variables (such as usage rate or loyalty), and organisational demographics variable (such as industry and number of employees).
