Although the random sum distribution has been well-studied in probability theory, inference for the mean of such distribution is very limited in the literature. In this paper, two approaches are proposed to obtain inference for the mean of the Poisson-Exponential distribution. Both proposed approaches require the log-likelihood function of the Poisson-Exponential distribution, but the exact for...

BACKGROUND In 1999, a World Health Organization (WHO) committee published histologic criteria for distinct thymoma entities (labeled as Type A, AB, B1, B2, B3 thymomas) and for the heterogeneous group of thymic carcinomas, collectively called Type C thymomas. Whether WHO-defined histologic thymoma subtypes are of independent prognostic relevance has yet to be proved. METHODS Two hundred thymo...

background and objectives: survival models are statistical technique to estimate or predict the overall time up to specific events. prediction is important in medical science and the accuracy of prediction is determined by a measurement, generally based on loss functions, called prediction error. the aim of this study is using parametric models to determine the factors influencing predicted sur...

A rank-select index for a sequence B = (b1, . . . , bn) of n bits, where n ∈ N = {1, 2, . . .}, is a data structure that, if provided with an operation to access Θ(log n) arbitrary consecutive bits of B in constant time (thus B is stored outside of the data structure), can compute rankB(j) = ∑j i=1 bi for given j ∈ {0, . . . , n} and selectB(k) = min{j ∈ N | rankB(j) ≥ k} for given k ∈ {1, . . ...

Survival curves for each group gives comparison at some arbitrary point(s) but it does not provide a comparison of the total survival experience of two groups. So some Non-parametric methods like log rank test, Cox-Mantel test are popular methods used for comparing the survival distribution and also these methods takes whole follow-up period. In this paper non-parametric methods are used for da...

The purpose of this study was to evaluate the effectiveness of the hybrid Levine equipercentile (Hybrid LE) and modified frequency estimation (MFE) equating methods in improving accuracy of equating as compared to the percentile rank frequency estimation (FE), kernel frequency estimation (Kernel FE) and percentile rank chained equipercentile (CE) equating methods under the common-item nonequiva...

Background: The aim of this study was to elaborate a randomized clinical trial protocol evaluate the effectiveness class I restorations in resin-modified glass ionomer cement (RMGIC) and bulk-fill resin primary molars with untreated early childhood caries toddlers. Material Methods: A total 59 toddlers up 36 months old at least two molar teeth dental single surface on different sides mouth will...

This review introduces methods of analyzing data arising from studies where the response variable is the length of time taken to reach a certain end-point, often death. The Kaplan-Meier methods, log rank test and Cox's proportional hazards model are described.