The two basic divisions of data are qualitative or categorical data and quantitative or numeric data.
Just because you have a number, doesn't necessarily make it quantitative. For example, zip codes, phone numbers and bank-accounts are numeric, but it doesn't make much sense to find the average phone number or median zip-code. These are examples of numbers applied to categorical data.
Chat with our AI personalities
qualitative
Quantitative data is quantity - how much. Qualitative data is quality - is it good? what is it like?
The length of a movie is quantitative data.
The fact that the data is qualitative or quantitative does not in and of itself have anything to do with its reliability.
Anytime you are able to measure something, it is quantitative data. Qualitative data represents the quality of something which cannot be measured.