Using 50 observations, the following regression output is obtained from estimating y = β0 + β1x + β2d1 + β3d2 + ε. Coefficients Standard Error t Stat p-value
Intercept −0.78 0.40 −1.95 0.0573
x 3.90 1.50 2.60 0.0125
d1 −12.60 16.80 −0.75 0.4571
d2 5.10 1.50 3.40 0.0014

Required:
Compute y-hat for x = 250, d1 = 1, and d2 = 0; then compute y-hat for x = 250, d1 = 0, and d2 = 1.