Questions 7-10. Suppose you are interested in studying the effectiveness of recreational marijuana usage to reduce stress. To do this, you collect a random sample of Ann Arbor residents and ask if they use recreational marijuana and measure perceived stress using the numerical Perceived Stress Scale (PSS), a common psychological instrument for measuring the perception of stress. Lower PSS scores indicate less stressed individuals. The data for your random sample is summarized below. Perceived Stress Scale (PSS) Recreational Marijuana N Median Mean Standard Deviation Users 63 14.8 15.6 7.1 Non-users 357 15.9 16.3 7.4 Let MJ be an indicator variable for recreational marijuana usage, such that M/ = 1 if an individual uses marijuana recreationally and M/ = 0 if they do not. Suppose the following model is fit to these data: E[PSS] = Bo + B1 x MJ 7. Compute the fitted value for . (Numerical Response) 8. Compute the fitted value for , . (Numerical Response)Suppose the following p-values are obtained for the fitted regression model: Ho: Bo = 0 vs. H1:Bo # 0 hasp