How to determine the most appropriate DC amplification value for a BJT?
The answer is that using a fixed beta (gain) for analysis is not the right way to do BJT analysis. They are given as a range because they vary for all sorts of reasons. That's why BJT circuits that work are designed to be very insensitive to the BJT's gain - they need to still work over the whole range.

Often a BJT circuit is designed to work for a gain of at least, say, 50 or 100. Then you just make sure the gain of the BJT you choose can't be less than that value, and you're done.