Statistical tests can be split into two categories.
I. Parametric tests
II. Non-parametric tests.
Parametric tests
(i) Test for Normality
Every data must follow certain distribution. But we have to find the appropriate distribution
from goodness of fit test.
Non-parametric tests:

List of non-parametric tests and their usage?
Mann-Whitney U test – Compare mean rank between two groups
Friedman test – Compare mean rank between three or more related groups.
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