Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 2010) study of the impact of reality TV shows on a college student’s decision to undergo cosmetic surgery, Exercise 12.17 (p. 728). Recall that the data for the study (simulated based on statistics reported in the journal article) are saved in the file. Consider the interaction model, E1y2 = b0 + b1x1 + b2x4 + b3x1x4, where y = desire to have cosmetic surgery (25-point scale), x1 = {1 if male, 0 if female}, and x4 = impression of reality TV (7-point scale). The model was fit to the data and the resulting StatCrunch printout appears above.

a. Give the least squares prediction equation.

b. Find the predicted level of desire 1y2 for a male college student with an impression-of-reality-TV-scale score of 5.

c. Conduct a test of overall model adequacy. Use a = .10.

d. Give a practical interpretation of R2

a. e. Give a practical interpretation of s.

f. Conduct a test (at a = .10) to determine if gender 1x12 and impression of reality TV show 1x42 interact in the prediction of level of desire for cosmetic surgery 1y2.