149 Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 2010) study of the influence of reality TV shows on one’s desire to undergo cosmetic surgery, Exercise 23 . Simulated data for the study are saved in the BODYIMAGE file. In Exercise 23, you fit the first-order model, E(y) = b0+b1x1+b2x2+b3x3+b4x4 , where y =

desire to have cosmetic surgery, x 1 is a dummy variable for gender, x2 = level of self-esteem, x3 = level of body satisfaction, and x4 = impression of reality TV. Conduct a complete residual analysis for the model. Do you detect any violations of the assumptions?