Quiz (Question Set) and scoring

I'm trying to wrap my head around the Score Range settings for each Question type as compared to the Score Range for the entire quiz. Does having the Score Range individually form a weighted grade? Does one setting override the other? 

If weighted, I am unable to make this function work. On the final question offered, if I add more than the 0-100% range and then get a correct answer, the Results button does not appear and I cannot see my final score. If anyone is able to provide some clarification, it'll be greatly appreciated.