Say you're trying to calculate an average win price for Post 3. You start charting, and observe values of:
Nothing out of the ordinary there, right?
Then, in comes a 3.20 or a 78.60. Now what do you do?
Say, "Hey, it happened," and include it in the average?
No, it's a fluke. Ignore it?
If you're not crunching stats, you may not care, but the question
is meaningful for those who do.
BTW, average payoff was just an example. Could apply to anything you're trying to measure, like player ratings.