# Parametric and Nonparametric tests

There are many nonparametric tests that have been developed over the years. Explain what nonparametric tests are and why they were developed. As part of your answer explain why it might be preferable to use a nonparametric test even when a parametric test could be used.

© BrainMass Inc. brainmass.com June 3, 2020, 11:41 pm ad1c9bdddfhttps://brainmass.com/statistics/nonparametric-tests/parametric-and-nonparametric-tests-292574

#### Solution Preview

There are many nonparametric tests that have been developed over the years. Explain what nonparametric tests are and why they were developed. As part of your answer explain why it might be preferable to use a nonparametric test even when a parametric test could be used.

In statistics, the term non-parametric tests refers to distribution free methods which do not rely on assumptions that the data are drawn from a given probability distribution. As such it is the opposite of parametric tests that assume that the data arise from a certain pre-specified ...

#### Solution Summary

Why and when should we use a nonparametric test even when a parametric is available?