Quantitative
Observations that deal with descriptions that cannot be expressed in numbers are called qualitative observations.
Manipulative observations
Such observations are said to be quantitative.
Qualitative observations
qualitative observation
Qualitative (quantitative are observations that can be expressed numerically)
qualitive
Qualitative data
There are two types of observation. There is what is referred to as the qualitative observation and what is referred to as quantitative observation. Qualitative observations do not deal with numbers, but rather details of an experiment per se. An example would be how a precipitate looks that was formed from a reaction. Quantitative observations deal with numbers; an example would be the amount of a substance (in grams) formed from a completed reaction.
observation without numerical values are qualatative with numbers is quantatative
that apple is red (includes no numbers at all and it describes an apple which is an observation)
This depends on what you are observing, but since number and amount are both measurements of quantity, they are somewhat interchangeable. Observations usually deal with both, because an observation is the action of observing something to collect information, and most information has to be quantified in order to be useful. And when quantifying something, a number or an amount has to be used.