Exercise

Survival curve quantiles from a Weibull model

We can now estimate the survival of the breast cancer patients in the GBSG2 data using a Weibull model.

The predict() function with type = "quantile" allows us to compute the quantiles of the distribution function. As we learned in this course so far, the survival function is 1 - the distribution function (\(S = 1 - D\)), so we can easily compute the quantiles of the survival function using the predict() function.

The survival package and GBSG2 data are loaded for you in this exercise.

Instructions

100 XP

Estimate a Weibull model for the breast cancer patients.
Get the time point at which the probability of surviving longer than that time point is 70 Percent (using the predict() function with type = "quantile").