Average
From Speedsolving.com Wiki
An average is a set of consecutive solves, in which the best and worst times are removed. Most competitions usually use averages of 5 for speedsolving events. There are a few exceptions however, most notably solving with feet, megaminx, clock, and 6x6/7x7.
Most speedcubers use averages of 12 to gauge their ability, because most view that averages of 5 contain too much luck. Averages of 100 can also be useful in determining consistancy in puzzles such as the 2x2 and magic, where virtually all mistakes count towards the average.
