Consider the following regression model Y = Bo + B₁X₁ + B₂X2+ B₂X3+1. We want to test the null hypothesis H₂ B + B₁ = 0. Which of the following is correct? : A. B. = 0. Estimate Y = (1 − X₁) + 71X1 + 72X2+1X3+ u and test the hypothesis 71 = 0. Estimate Y = %(1 + X1) + 71X1 + 72X₂+½X₁+ and test the hypothesis Estimate Y = 70+71(X1 − X3) + 72X2+BX3+u and test the hypothesis Estimate Y = 7+71(X1 + X3) +72X2+7X3+ and test the hypothesis C. = 0. D. = 0.
