Fundamentals of Statistics contains material of various lectures and courses of H. Lohninger on statistics, data analysis and chemometrics......click here for more. 
See also: robust regression, Parametric and NonParametric Tests  
Robustness
A statistical procedure is considered to be robust if it performs well even when required assumptions are not met, or if the procedure performs well for a large number of distributions. A "statistical procedure" could be any item, from an estimate to a statistical test, or from a modeling technique to cluster analysis. Robustness is a big issue in applied data analysis, since practical problems tend to create outliers. A simple example of a robust statistic is the median
in comparison with the mean. The median is less affected by outliers than
the mean.


Last Update: 20121008