What is are the functions of parametric statistical procedur

What is (are) the function(s) of parametric statistical procedures?

Solution

Parametric statistics is based on the assumption that data have come from a certain probability distribution and hence makes inferences about the parameters.

For instance, parametric tests assume that the sample has been randomly selected from the population it represents and that the distribution of data in the population has a known underlying distribution. The most common distribution assumption is that the distribution is normal. Other distributions include the binomial distribution (logistic regression) and the Poisson distribution (Poisson regression). Additionally, parametric statistics require that the data are measured using an interval or ratio scale, whereas nonparametric statistics use data that are measured with a nominal or ordinal scale. Some frequently used parametric tests ...