(a). Compute s 2 , Cp, PRESS residuals, and PRESS statistic for the model y = 0 + 1x1 + 2x2 + 3x3 + 4x4

(a). Compute s 2 , Cp, PRESS residuals, and PRESS statistic for the model y = β0 + β1x1 + β2x2 + β3x3 + β4x4 + ². (b). Compute s 2 , Cp, PRESS residuals, and PRESS statistic for the model y = β0 + β1x1 + β2x3 + β3x4 + ². (c). Compare the regression models from parts

(a) and

(b) and comments on the prediction of fish biomass.