A parametric test is a type of statistical test that requires data to be symmetric (or normally distributed), e.g. a t-test. A non-parametric test uses data that are asymmetric, e.g. Mann-Whitney U-Test.
A parametric test is a type of statistical test that requires data to be symmetric (or normally distributed), e.g. a t-test. A non-parametric test uses data that are asymmetric, e.g. Mann-Whitney U-Test.