For the wheat kernel data, consider again the estimated multinomial and proportional odds models from Sections 3.3 and 3.4 that included all of the explanatory variables as linear terms.
(a) Construct plots of the estimated models with the estimated probability on the y-axis and density on the x-axis, where the remaining explanatory variables are set to their mean values. Interpret the plots and compare the models.
(b) How do the plots from (a) change when the remaining explanatory variables are set to values other than their mean values?
(c) Construct additional plots as in (a), but now for explanatory variables other than density on the x-axis.