Nonparametric Tests Among Groups
The intent of this section is to present nonparametric statistics that tests differences between groups, however, the Spearman Rank Order correlation is included (correlation assesses a relationship not differences).
When using nonparametric statistics one makes no assumptions about the distribution of the data. The underlying distribution or characteristics of the data may be nominal, ordinal, interval or ratio data. Comparable parametric statistics are shown in square brackets.
