A resistant statistic is a statistic whose value is affected only slightly by a small number of arbitrarily large changes in the data. The median and interquartile range are resistant, whereas the mean and standard deviation are not.
Resistant Statistic
See also
Interquartile Range, Mean, Median, Robust Estimation, StatisticExplore with Wolfram|Alpha
References
Tukey, J. W. Exploratory Data Analysis. Reading, MA: Addison-Wesley, 1977.Cite this as:
Weisstein, Eric W. "Resistant Statistic." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/ResistantStatistic.html