I'm not sure about reality because Basketball isn't my favourite sport, but as said by the nomenclature that you told me to look at:A player with a higher jump range will find that the effectiveness of his jump shot decreases less with distance.Which means the closer you are to the net (this can be with distance or height) the better you shoot. So you can JUMP. The name is jump range meaning that it's the range you can jump. So yes, jump range has to do with jumping.P.S - It's not about winning or losing, it's about making an epic thread!
A player with a higher jump range will find that the effectiveness of his jump shot decreases less with distance.