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. 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, E(y) = β0 + β1x1 + β2x4 + β3x1x4, 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 SPSS printout shown below.
a. Give the least squares prediction equation.
b. Find the predicted level of desire (y) for a male college student with an impression-of-reality-TV-scale score of 5.
c. Conduct a test of overall model adequacy. Use α = .10.
d. Give a practical interpretation of R2a.
e. Give a practical interpretation of s.
f. Conduct a test (at α = .10) to determine if gender (x1) and impression of reality TV show (x4) interact in the prediction of level of desire for cosmetic surgery (y).

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Model Summary Adjusted R Square Std. Error of the Estimate R Square 449 670 439 2.350 a. Predictors: (Constant), GENDER IMPREAL IMPREAL GENDER ANOVA Sum of Squares df Mean Square Si 000 747.001 916.787 1663.788 249.00045.086 Residual Total 166 169 5.523 a Dependent Variable: DESIRE b. Predictors: (Constant), GENDER IMPREAL IMPREAL, GENDER Coefficients Standardized Unstandardized Coefficients Coefficients B Std, Error Sig 8 11.779 -1.972 Beta Constant GENDER IMPREAL GENDER IMPREAL 674 1.179 162 276 17,486 585 -553 -303-1.672.096 000 047 258 3,617 -378 -2.004 a. Dependent Variable: DESIRE