  In this paper, we have obtained conditions on parameters that result in
dispersive ordering and star ordering among two unequal sets of random
variables from Proportional hazard rate and Proportional reversed hazard rate
family of distributions. The n-independent random variables under observation
belonging to a multiple-outlier model are given as corollary. The conditions
obtained involve simple inequalities among the parameters and class of life
distribution corresponding to ageing. Some stochastic ordering results for
sample minimum and maximum with dependency based on Archimedean copula has also
been studied by varying the location parameters.
