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One or two variables? - Coggle Diagram

- - - - z test
    - - 1 sample t test
  - - - Standard Normal Distribution
    - - Student's T distribution
- - - - Parametric
        
        Unpaired T
      - Non-parametric
        
        Mann-Whitney
    - - Parametric
        
        Paired T
      - Non-parametric
        
        Wilcoxon
  - - - Parametric
        
        Pearson's
      - Non-parametric
        
        Spearman's
    - - Chi squared