The following estimated regression equation based on 30 observations was presented. 9 = 17.6 + 3.8x1 2.3x2 + 7.6x3 + 2.7x4 The values of SST and SSR are 1,803 and 1,750, respectively. (a) Compute R2. (Round your answer to three decimal places.) R2: 2 . (b) Compute Ra . (Round your answer to three decrmal places.) 2_ RE (c) Comment on the goodness of t. (For purposes of this exercise, consider a proportion large if it is at least 0.55.) ' The estimated regression equation did not provide a good t as a small proportion of the variability in y has been explained by the estimated regression equation. ' The estimated regression equation provided a good t as a small proportion of the variability in y has been explained by the estimated regression equation. \\ The estimated regression equation did not provide a good t as a large proportion of the variability in y has been explained by the estimated regression equation. \" The estimated regression equation provided a good t as a large proportion of the variability in y has been explained by the estimated regression equation