Abstract
In this paper, we have proposed a new family of distributions namely the Pareto-X family of distributions. A sub model of the proposed family called Pareto-Weibull (PW) distribution is discussed. Some important properties of the proposed PW distribution are studied. Parameter estimation of the distribution by using the maximum likelihood method is discussed. The proposed distribution has been fitted on two real data sets about environmental and biological variable. The practical applications shows that the proposed model provides better fit as compared with the other models used in the study.