Wilcoxon Intra-Well
Wilcoxon Non-Parametric Analysis
Intra-Well Comparison
Other Non-Parametric Tests:
Wilcoxon Inter-Well Comparison
Non-Parametric Prediction Limits
Non-Parametric Tolerance Limits
Description:
The Wilcoxon Rank-Sum method is a non-parametric rank method. ChemStat provides an intra-well comparison implementation of the Wilcoxon method. The Wilcoxon method provides advantages over other intra-well comparison methods, including suitability to high percentages of non-detects, suitability for normal or non-normal data distributions, and reduced susceptibility to outlier concentrations.
Use:
Use this method as a non-parametric method for intra-well comparisons.
Remarks:
The use of the Wilcoxon method for intra-well comparison is developed exclusively for ChemStat and is not discussed in any know research or USEPA guidance documents.