I think it is more reasonable to say the general outcome of a pre-experience master than a MBA
since the variety of the income class is smaller in a pre-experience master as most of them are fresh graduates,
therefore, when evaluting a pre-experience master, it somehow make sense to do this empirically, i.e. looking at the placement record, since the initial starting point is similar.
however this logic doesn't work for MBA since the initial point differs a lot.
The only way to do so is to look at rankings, reputation, and most improtantly the educational process, e.g. who is teaching, which companies are coming on-campus, and etc....