Final answer:
The level of measurement of the data for estimating the age of artifacts from an archaeological excavation is ordinal.
Step-by-step explanation:
In archaeology, ordinal measurement is used to rank or order artifacts based on their age or other categorical attributes, but it does not provide precise numerical values.
For example, artifacts can be ranked as 'older' or 'younger' based on their stratigraphic position or comparison to reference artifacts, but the exact numerical age is not determined.