What are the three main situations in which we use a nonparametric test?

Question: What are the three main situations in which we use a non-parametric
test?
Ans: The data that one gets for analysis is of two broad types.
1. Discrete
Discrete data is either Nominal or Ordinal
2. Continuous
Continuous data is either Interval or Ratio
Non Parametric statistics is used when -----
1. The data is either Nominal or...