I am trying to figure out exactly what is being randomly selected. I have a layer of road segments and I would like it to select a road segment at random within a neighborhood (the subset). This would be equivalent to selecting a random row in the attribute table within each neighborhood.
This seems to work but I feel (I know it is hard to actually judge if something is random) like it is selecting more segments in less dense areas. This got me wondering if it is actually doing something closer to generating random points within each neighborhood and selecting the nearest segment to each.
So is it randomly selecting a row in the attribute table, randomly selecting points in space, or something else?