Abstract
A procedure for choosing between models from two families of distributions for failure data is given. This method is based on F-statistics and can be used for a non-censored set of life testing observations. Monte Carlo samples from exponential , Wei bull , Pareto and finite range distributions are used. The performance of the proposed procedure is compared to the selection procedure S, derived by Quesenberry and Kent (1982)and to the MLR test considered by Bain and Engelhardt (l980).