Abstract Fatal Shock, competing risks and stress models are utilized in reliability survival analysis to characterize various application types. In this context, paper aimed introduce a new class of bivariate distribution based on the Marshall–Olkin type. The proposed termed as Bivariate Extended Chen (BEC) so that marginals have distribution. Some properties derived explained. BEC parameters e...

It is well known that Poisson binomial distribution can be approximated by Poisson distribution. In this paper, we give a nonuniform bound of this approximation by using Stein-Chen method.

the two-spotted spider mite, tetranychus urticae koch (acari: tetranychidae), is an economically important pest of ornamental plant in iran. the population abundance and spatial distribution were studied on five rosa cultivars including maroussia, wendela, elderado, wenedetta, and hot lady during two growing seasons of 2011 and 2012 in greenhouse. the k parameter, index of dispersion, lloyd’s m...