Nonparametric tests are useful when - all of the answers are correct.
What is Nonparametric Test ?
A nonparametric test is an experiment that does not require a population to base assumptions on. It does not rely on data relating to a particular parametric set of probability distributions. Nonparametric methods are also called nonparametric tests because they have no population.
Why it is useful ?
It is useful in enormous number of situation.
It is very easy to understand.
Useful when there are many variable data are present.
It is a distribution free test.
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