c_lr1_1.gif

Ylist as y_1, y_2,...y_K. Xlist as x_1, x_2,...x_K. WeightList as w_1, w_2, ...w_K. If w_1 is #Missing or the whole weightList is missing as an argument, w_i=1. S=\sum_{i-1}^K (w_i)^2. S_x=\sum_{i-1}^K x_i (w_i)^2. S_y=\sum{i-1}^K y_i (w_i)^2. S_xx=\sum_{i-1}^K (x_i)^2 (w_i)^2. S_xy=\sum_{i-1}^K (x_i y_i) (w_i)^2. \Delta=SS_xx - (S_x)^2.