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Experiment Design - Coggle Diagram

- - - - Why compare d^ with ME
  - - - Cohort is entering the data, avoid learning effect/retention, same time period
    - - Can affect metric's variability
- - - - mean=p, stddev= sqrt(p(1-p)/N)
  - - - margin of error (m)
        
        m = z* SE
      - Standard error (SE)
        
        SE = sqrt(p(hat)*(1-p(hat))/N)
      - To use normal (Z-score)
        
        Check Np(hat) > 5 and N(1-p(hat)) > 5