Question: PHST 683 - Survival Analysis Week 14 Homework Assignment (25 pts) Consider the data set measuring time to weaning from breast feeding, discussed in Section

PHST 683 - Survival Analysis Week 14 Homework Assignment (25 pts) Consider the data set measuring time to weaning from breast feeding, discussed in Section 1.14 of K&M and included in R library KMsurv as the bfeed data set. Using the following covariates - smoking status (smoke), alcohol use status (alcohol), race of the mother (race), poverty status (poverty), and the interaction of smoking status and alcohol use - fit the following three models

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