Question: 1. (10 points) Using the recidivism data recid.sas7bdat, plot the 95% pointwise confidence limits and the 95% confidence band of time to first arrest. Between

1. (10 points) Using the recidivism data recid.sas7bdat, plot the 95% pointwise confidence limits and the 95% confidence band of time to first arrest. Between the two confidence interval estimates, which one is wider? Why? 2. (30 points) Compare the KM estimates by groups of working experience by parole status (4 groups here). 2.1 What is your finding? Comment on which groups are different and why the conclusion. 2.2 Between the working experience and parole status, which is the driving factor for the difference in the risk of getting arrested again? You may need to run group comparison by individual covariates here

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