Final answer:
The level of measurement for income measured as a range is 'Ratio' because it includes a natural order, meaningful differences, and a true zero point, allowing for ratio comparisons.
Step-by-step explanation:
When we talk about measuring income as a range, such as "$0-$999, $1000-$1999, $2000-$2900, ...", we are considering the level of measurement for this type of data. Income measured in such ranges indicates both a natural ordering and the ability to make meaningful comparisons of magnitudes, as well as a clear starting point of zero, which allows for the comparison of ratios. Therefore, the correct level of measurement for this data is Ratio level, as it satisfies all the conditions: there is a true zero point, the data can be ordered, differences have meaning, and it is possible to say how many times higher one is than another.