It is indeed subjective, however, you can assume many things and lots of things are related to some key factors such as: Economic factors (household income), Highest Level of Education Attained, Crime rate. Chances are that the "noise" level increases as all the above decrease in quality.
As good place to see all this in one place plus rent comps for a particular area is zilpy.com. Check out the newly released reports. https://twitter.com/zilpyrent