The methods of parametric statistics can be applied to nominal or ordinal data.

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Parametric statistics rely on assumptions about the underlying distribution of the data, such as normality or equal variances. Nominal and ordinal data do not have a numerical value that can be used in calculations, and do not have a defined distribution. Therefore, non-parametric statistical methods are usually used for this type of data.

The Methods of Parametric Statistics Can Be Applied to Nominal