I don't know how to calculate this. I have set up a diagram with sum of x^2, sum of xy, and sum of y^2 and found the pooled SS and the common SS (with Cc-Bc^2/Ac) and found that the slope of my regression lines (four of them) are equal but now I need to find the total SS to compare a calculated F value to a critical F value to see if elevations are equal. I know the SSt is Ct-Bt^2/At but i dont know how to find At, Bt, or Ct. Help!
Calculating Total residual sum of squares to compare regression line elevations.?
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