Multiple Choice
Which of the following regression models does not include an interaction variable?
A) y = β0 + β1x + β2xd + ε
B) y = β0 + β1x + β2x2 + ε
C) y = β0 + β1d + β2xd + ε
D) y = β0 + β1x + β2d + β3xd + ε
Correct Answer:

Verified
Correct Answer:
Verified
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