The way I remember is by thinking of a quality of someone. Its a characteristic of an object..so like gold, or cold...etc.
A qualitive observation is an observation of a product of a reaction which cannot be measured numerically, e.g. colour, state of matter.A quantitive observation is an observation which can be...
quantitative is observations with numbers and qualitative does not
Qualitative observation are ones that deal with numbers. Qualitative observation are all other observations.
Quantitative observations refer to empirical and/or calculated data, while the latter refer to things such as colour and smell.