Consider the model:
y = β0+ β1x1+ β2 x2+ β3 x3+ε
The resulting least squares prediction equation is
ŷ = 44.8 + 2.2x1 + 9.4 x2+15.6 x3
- a. What is the response line (equation) for E(y) when x2 = x3 = 0? When x2 = 1 and x3 = 0? When x2 = 0 and x3 = 1?
- b. What is the least squares prediction equation associated with level 1? Level 2? Level 3? Plot these on the same graph.
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