m. Test whether the effect of weight on resting pulse rate diEers for smokers and non-smokers. Write out the null and alternative hypothesis, the test statistic, pvalue3 and make a conclusion in context of the problem. n. Go back to your model that was tted in part e. Is this a good tting model (based on the Rsquared value)? 0. Explain how Exercise amount could be a potential confounder in this study. p. Mom your model in part j., how would you test if weight should be in the model? Write only the null and alternative hypothesis