D webassign.net In a regression analysis involving 30 observations, the following estimated regression equation was obtained. 19.8 +3.9x - 2.1x2 + 7.7x3 + 2.6x4 (a) Interpret b in this estimated regression equation. Ob = 3.9 is an estimate of the change in y corresponding to a 1 unit change in X2 when X1, X3, and X4 are held constant. Ob = -2.1 is an estimate of the change in y corresponding to a 1 unit change in X when X2, X3, and X4 are held constant. Ob = 3.9 is an estimate of the change in y corresponding to a 1 unit change in X when X2, X3, and X4 are held constant. Ob = 7.7 is an estimate of the change in y corresponding to a 1 unit change in X3 when X1, X2, and x4 are held constant. Ob = 2.6 is an estimate of the change in y corresponding to a 1 unit change in X4 Interpret b in this estimated regression equation. when X1, X2, and x3 are held constant. b2 = 7.7 is an estimate of the change in y corresponding to a 1 unit change in X3 when X1, X2, and X4 are held constant. b = -2.1 is an estimate of the change in y corresponding to a 1 unit change in X2 when X1, X31 and b2 = 2.6 is an estimate of the change in y corresponding to a 1 unit change in 4 when x X1, X21 X4 and X3 are held constant. are held constant. b = 3.9 is an estimate of the change in y corresponding to a 1 unit change in X when X2, X3, and X4 are held constant. Ob = 2.1 is an estimate of the change in y corresponding to a 1 unit change in 1 when X2, X31 and X4 are held constant. Interpret b3 in this estimated regression equation. b3 = 7.7 is an estimate of the change in y corresponding to a 1 unit change in X3 when X1, X2, and X4 are held constant. b3 = 7.7 is an estimate of the change in y corresponding to a 1 unit change in X2 when X1, X3, Ob3 = 3.9 is an estimate of the change in y corresponding to a 1 unit change in X3 when Ob3 b3 = -2.6 is an estimate of the change in y corresponding to a 1 unit change in 4 when b3 = -2.1 is an estimate of the change in y corresponding to a 1 unit change in x1 and X4 are held constant. X1' when X1, X21 and X4 are held constant. X2, and X3 are held constant. X2, X31 and X4 are held constant. Interpret b in this estimated regression equation. b4 = 3.9 is an estimate of the change in y corresponding to a 1 unit change in X4 when b = 7.7 is an estimate of the change in y corresponding to a 1 unit change in X2 X1, X21 and X3 are held constant. when X1, X3, and X3 are held constant. b4 = 2.6 is an estimate of the change in y corresponding to a 1 unit change in X3 when X1, X2, and X4 are held constant. b4 = -2.1 is an estimate of the change in y corresponding to a 1 unit change in X2 when X1, X3, and X4 are held constant. Ob4 = 2.6 is an estimate of the change in y corresponding to a 1 unit change in X4 when X1, X2, and X3 are held constant. (b) Predict y when x = 10, x2 = 5, x3 = 1, and x4 = 2. MacBook Air DII DD A e 833