Qualitative data:values that can be placed into distinct categories according to some characteristics or attribute

Discrete: assume value can be counted like number of brothers

Continues:assume all values between any given two values like body temperature (your body temperature can be 36.7 but you can’t have 2.5 brothers)

Ordinal:characterized in term of ranking from better to worse but the data are not measured in terms of continues scale like medical condition  (mild, moderate, severe)