Question: The time to failure of a nickel-cadmium battery is Wei bull distributed with parameters v = 0, fJ = 1/4, and α = 112 years.
(a) Find the fraction of batteries that are expected to fail prior to 1.5 years.
(b) What fraction of batteries are expected to last longer than the mean life?
(c) What fraction of batteries are expected to fail between 1.5 and 2.5 years?