One study of cancer patients showed that the survival times (in weeks) of cancer (Mesothelioma) patients since detection are distributed lognormal with μ = 3.5 and σ = 1.0.
a What percent of cancer patients are expected to survive for 6 months after detection?
b What percent of patients are expected to survive beyond a year after detection?
c At how many weeks will only 5% of cancer patients survive?