mudphudder

Nonparametric tests are also referred to as distribution-free tests. These tests are used when you cannot make the assumption of normality. Non-parametric tests compare medians rather than means and, as a result, if the data have one or two outliers, their influence is negated. But how do non-parametric tests compare to the usual parametric statistical [...]

January 9th, 2009 | Tags: statistics | Category: research | Comments (3)