(a) Fit a second ord eins of girth and Use the odor data for this question. second order response surface for the odor response using the other three ables as predictors. How many parameters does this model use and how many degrees of freedom are left? Got a model for the same response but now excluding any interaction terms + including linear and quadratic terms in all three predictors. Compare this model to the previous one. Is this simplification justified? Use the previous model to determine the values of the predictors which result in the minimum predicted odor. (b) Fit a model odor temp gas pack 66 -1 -1 39 43 -1 1 0 49 1 1 0 58 -1 0 -1 .17 Hemtoon999 . YOO OOHHHHHHHHOOO WW Novob OOOHH OOOOHHH QUIN 15 (a) Fit a second ord eins of girth and Use the odor data for this question. second order response surface for the odor response using the other three ables as predictors. How many parameters does this model use and how many degrees of freedom are left? Got a model for the same response but now excluding any interaction terms + including linear and quadratic terms in all three predictors. Compare this model to the previous one. Is this simplification justified? Use the previous model to determine the values of the predictors which result in the minimum predicted odor. (b) Fit a model odor temp gas pack 66 -1 -1 39 43 -1 1 0 49 1 1 0 58 -1 0 -1 .17 Hemtoon999 . YOO OOHHHHHHHHOOO WW Novob OOOHH OOOOHHH QUIN 15