1. In Example 13.1, fit a non-proportional model where the Weibull shape parameter differs between squamous (1) and the other cell types (a common parameter

1. In Example 13.1, fit a non-proportional model where the Weibull shape parameter differs between squamous (α1) and the other cell types (a common parameter α2 for all three other types) (Aitkin et al., 2005). Obtain the posterior probability that α1 > α2.