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An outlier is an observation that appears to be unusual or not well described relative to a simple characterization of a dataset. A discomfiting possibility is that these data come from a different population than the one intended to be studied.

7 votes

What do you call an average that does not include outliers?

I don't know if it has a name, but you could easily come up with a number of algorithms to reject outliers: Find all numbers between the 10th and 90th percentiles (do this by sorting then rejecting the …
Jason S's user avatar
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