MLE estimation of Lognormal and Exponential parameters in a Competing Risks Model¶ ↑

Two usage-measured lifetime random variables are discussed in a fixed-time life test. The items under study are considered to accumulate usage independently and with a different rate. The survival population is considered textit{Lognormally distributed} (with parameters $mu$ and $sigma$), while the failure popoulation - textit{Exponential} (with parameter $lambda$).