Final answer:
The statement is false; countries are not classified only on a single dimension in aggregate segmentation as it requires a multi-dimensional analysis to accurately reflect the characteristics of countries within a region.
Step-by-step explanation:
The statement that in a "country-as-segments or aggregate segmentation," countries are classified only on a single dimension is False.
Aggregate segmentation involves analyzing a variety of factors such as economic characteristics, cultural patterns, or political environments to classify countries. It is common, for example, to look at per capita real GDP, but this doesn't give the full picture since a region can consist of both high-income and low-income countries.
When data for a region is aggregated, it may not appropriately reflect the economic status of each individual country, thus showing the need for multi-dimensional analysis.