1. How to decide to run a parametric or non-parametric test
Are both variables scaled?
Are both distributions
Normal?
Both Scaled
At least 1 variable is
Ordinal, or Nominal
Both Normal
At least 1 Skewed
Choose a
Parametric Test
Are both sample sizes
greater than 30?
Both
Greater
than 30
Choose a
Non-Parametric Test
At least 1
is Less
than 30