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Work Rank (Stats (Correllation (Rule of thumb (r > 2/squareroot(n))), Z…

- - - - r > 2/squareroot(n)
- - - - variables
        
        X mean
        
        Y mean
        
        Y independant
        
        X independant
      - Bo value
        
        Y mean minus Bi value times X mean
      - Bi value
        
        A= sum(xi- Xmean X yi -Ymean )
        
        B =sum(square((xi- Xmean)))
        
        Bi Value = A/B
      - Graph
        
        SSR sum(square(Yp - Ym))
        
        SST sum(square(Yi - Ym))
        
        SSE sum(square(Yi - Yp))
    - - Least Squared
        
        Prediction
        
        Slope
        
        Y =
        
        Wider the x axis smaller the slope
        
        X compare to Y used for direction of slope and if correlation