Answer:
Measurement
Explanation:
Scientific research require observation and there are two types of observations, quantitative and qualitative observation
Collecting quantifiable data that is possible to be expressed in a number format is said to be a quantitative observation
Quantitative observation can also be described as observations that are defined by both words and numbers and they are therefore more useful than qualitative observations that involve only words
Quantitative observations involve expressions of variables that are quantifiable, that is material hat can be expressed in numbers.
