STA221H1 Lecture Notes - Lecture 34: Plastic Surgery, Reality Television, Dependent And Independent Variables
5 Apr 2018
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Fit a model with no interaction term. Use slide #23 in week 9 lecture notes as a guide. this is for the residual values in the non-interaction-term model. There appears to be a moderate, negative association between interaction term (impression level of reality tv and gender) when gender is male. The residuals suggest to add the interaction term when impression level of reality tv and gender are already in the model: fit an interaction model that you proposed in question 5. + 3x1x2: use the lm function in r to estimate the interaction model (give the least-squares prediction equation). Residual standard error: 2. 35 on 166 df: test whether the overall model is statistically useful for predicting one"s level of desire to undergo cosmetic surgery. 0 : 1 a : not all of the i. That is, test whether one"s impression of reality tv and their gender interact to predict desire to have cosmetic surgery.
