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STATISTICS, HYPOTHESIS TESTING - Coggle Diagram

- - - - CONFIDENCE INTERVAL OF THE MEAN
        
        T DISTRIBUTION (T-STUDENT)
        
        when sample size is large and we don't know variance could be t or z
        
        when sample size is small and variance is not known always t
        
        Z DISTRIBUTION (GAUSSIAN)
        
        all other cases
      - CONFIDENCE INTERVAL OF DIFFERENCE OF TWO MEANS
        
        unknown standard deviation
        
        known standard deviation
      - PROPORTIONS
      - DIFFERENCE OF TWO PROPORTIONS
      - VARIANCES
      - RATIO OF TWO VARIANCES
      - how to determine sample size
      - how to determine level of precision
- - - - EQUAL VARIAMCE
      - UNEQUAL VARIANCE
  - - - EQUAL
      - UNEQUAL
- - - - EQUAL
      - UNQEUAL
  - - - EQUAL
      - UNEQUAL