Originally Posted by kaply
In statistics it's called a median. Although for some reason I vaguely have the impression that it's acceptable to use average to refer to either mean, median or mode?
Lets not confuse the situation. Median is just the middle number, so the median of 2, ,7 , and 8 is 7. The average is usually assumed to be the mean, and that's what Apple's average star rating is. The mean of 1 and 5 is 3. An "average", centered between highest possible and lowest possible, rating in the AppStore is 3 stars.
Anyway, sorry to take this thread in a strange direction :P
It is a humorous chart.