Exercise

Computing a Weibull and a log-normal model

In this exercise, we want to compute a Weibull model and a log-normal model for the GBSG2 data. You will see that the process of computing the survival curve is the same. In the upcoming exercise, we will compare the results from the two models and see the differences.

The survival, survminer, and reshape2 packages and the GBSG2 data are loaded for you in this exercise.

Instructions 1/2

XP

1
2

Compute the Weibull model
Compute the log-normal model

The Weibull distribution is the the default for survreg(). To compute a log-normal model you need to adjust the distribution argument.