Which statement is not true about partial regression coefficients?
A) The combined effects of X1 and X2 on Y are additive. In other words, if X1 and X2 are each changed by one unit, the expected change in Y would be (b1 + b2).
B) The beta coefficients are the partial regression coefficients obtained when all the variables (Y, X1, X2...Xk) have been standardized to a mean of 0 and a variance of 1 before estimating the regression equation.
C) Partial regression coefficients have an order associated with them.
D) Both A and B are not true.
C
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