Winsorized mean

PrepNuggets

Similar to the trimmed mean, but instead of discarding the highest and lowest observations, we substitute a value for them. For example, to calculate a 90% winsorized mean, we would determine the 5th and 95th percentile of the observations. Any values lower than the 5th percentile will be substituted with 5th percentile value, and any values greater than the 95th percentile will be substituted with 95th percentile value. In essence, all the observations are considered in the calculation of the mean, just that the extreme outliers are substituted with values that are not too extreme.

See also: Trimmed mean