The following estimated regression equation is based on 30 observations.
ŷ = 18.3 + 3.9x1 - 2.4x2 + 7.8x3 + 2.5x4
The values of SST and SSR are 1,810 and 1,757, respectively.
a. Compute R² (to 3 decimals).
b. Compute Ra² (to 3 decimals).
c. Comment on the goodness of fit.
The estimated regression equation - Select your answer - .