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Method that eliminates data that stands out the most?

Is there an official name for getting a statistic used by calculation the statistic on a sample and eliminating the data that stands out the most?
Lets say I'm trying to get the mean on 1,4,6,4,100. I would eliminate 100 from my data set.
I would know how to do that, but I would like to research various methods that do these kind of process. 

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Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
4.8 4.8 (4 lesson ratings) (4)
 What you are asking for is called outlier. It depends on the circumstance and how large of a sample there is, how often they appear, and whether the samples are randomized, or  rightfully belong to the outside of the confidence interval.