A??? Since we don’t need 3 dummy variables. This should be a good enought regression equation… R = a + b1D1 + b2D2 + epsilon D1 = [0,1] = GROUP-1 D2 = [0,1] = GROUP-2 D1 = 0 and D2 =0 = GROUP-3
Dinesh - You getting that one right is just plain sick. I would’ve never looked for that. Well done.