Analyze the response time dataset. In R, the data are available via the command data("rtime", package = "smdata"). Stata users may access the file at https://dl.dropbox.com/u/1857674/SmiMerBook/SmiMerDoc.html via the link “ch7 rtime.dta”. Run the log-normal and log-logistic models, obtaining the relevant coefficients and scale parameter estimates. Compute the censorship probability estimates for both models and compare these with their counterparts in the Tobit and Weibull models as described in Section 7.2. Rusers tip: You will need to use the plogis function to obtain the censorship probabilities for the log-logistic case.