31 5 FURTHER INFORMATION ABOUT R-EXERCISE 5: Data and Packages: We use the dataset "smoking.csv" that we analysed in Tutorial 09. We are interested in estimating the smoking probability as a function of age. For all estimation of linear probability models, the type of standard error should be "HC1" or equivalently "stata". For the questions below, it is assumed that the required R packages are loaded and the data are attached. QUESTION 3 Regress smoker on cubic polynomials of age, using a linear probability model. What is the p-value for testing the hypothesis that the probability model is linear in age? (two decimal places)
