Final answer:
Quantitative observation is considered more useful to a scientist because it provides specific measurements, is easily interpreted, and allows for mathematical analysis.
Step-by-step explanation:
Quantitative observation is considered more useful to a scientist for several reasons. Firstly, quantitative data provides specific measurements and numerical values, which allows for more accurate analysis and comparison. For example, if a scientist is studying the effect of temperature on the growth of plants, quantitative data such as measuring the height of the plants at different temperatures will provide more precise information.
Secondly, quantitative data can be easily interpreted and communicated to others. Numbers and statistics are universally understood, making it easier for scientists to share their findings with colleagues and the scientific community.
Lastly, quantitative observation allows for the application of mathematical and statistical analysis, enabling scientists to identify trends, patterns, and correlations in their data.