<p>(a) Fit a linear regression models to the these data using profits as the dependent variable and sales and assets as the independent variables.</p><p>(b) Analyze the residuals to check the adequacy of the model . Compute the leverages associated with the data points. Does one (or more) of these companies stand out as an outlier in the set of independent variables data points?</p><p>(c) Generate a 95% prediction intervals for profits corresponding to sales of 100(billions of dollars) and assets of 500(billions of dollars).</p><p>(d)Carry out likelihood radio test of H0:U1=0 with a significance level of a=0.05. Should the original model be modified? Discuss.</p><p>(e)Calculate the CP and AIC for each possible regression . you chose best model of all possible regression? Explain.</p><p>还有还有！谢谢</p><p>&nbsp;</p><br/>