Discussion
The on-site monitoring data is known as...................data.
Answer: B
On-site monitoring data is primary data.
Primary data is collected first-hand by the investigator for the study at hand, as in sampling air, water or noise at a project site during an environmental impact assessment. It is the most direct and specific evidence.
Secondary data has already been collected by someone else, such as published reports, census figures or earlier studies, and tertiary sources compile and summarise those. 'Numerical' describes the form of data, not its source, so it is not the category asked for.
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