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.
Qualitative (quantitative are observations that can be expressed numerically)
qualitive
Manipulative observations
qualitative 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.
Quantitative
Observations that deal with descriptions that cannot be expressed in numbers are called qualitative observations.
Quantitative
Quantitative
Qualitative observations
Qualitative (quantitative are observations that can be expressed numerically)
qualitive
Quantative or Quantifiable Measurements. You can take some measure and get a number out. Length, Temperature, Area etc. As opposed to Qualititive Measure - Happiness, anger etc you can't take a ruler to someones mood.
Deal with a number, or amount.
Manipulative observations
Deal with a number, or amount.