Suppose that we have a cross-sectional data set drawn by random sampling.
Then, the data may represent our population of interests.
We can consider two subpopulations: male group and female group.
Here, I want to draw a "representative" observation for each subpopulation.
If I choose a male "randomly" from the male subpopulation, can I say that this observation represents the subpopulation?
In a sentence, I want to draw a male who represent the subpopulation of men.
Then, is random drawing from the subpopulation an appropriate way?