The regression equation for a categorical variable with four categories would be modeled as ________.
A) Ўi = a + b1 D1 + b2 D2 + b3D3
B) Ў= b1 D1 + b2 D2 + b3D3
C) Ў= b1 D1 + b2 D2 + b3D3 + b4D4
D) Ўi = a + b1 D1 + b2 D2 + b3D3 + b4D4
Correct Answer:
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