BACKGROUND Mortality estimates can measure and monitor the impacts of conflict on a population, guide humanitarian efforts, and help to better understand the public health impacts of conflict. Vital statistics registration and surveillance systems are rarely functional in conflict settings, posing a challenge of estimating mortality using retrospective population-based surveys. RESULTS We pre...

To evaluate the performance of the empirical predictors presented in San Martino et al. (2005), we compute the cases where they are the best, “equivalent” to the best (tables 1) or poor (table2). We consider only the case of equal unknown within cluster variances. First, we consider the cases in which each of the proposed predictors has the best performance, i.e. we compute the percentage of ca...

In many situations there is interest in parameters (e.g., mean) associated with the response distribution of individual clusters in a finite clustered population. We develop predictors of such parameters using a two-stage sampling probability model with response error. The probability model stems directly from finite population sampling without additional assumptions and thus is design-based. T...

this article studies emotional divorce and the sociological factors effective on it in the city of tehran. the statistical population of the research includes all the families residing in the city of tehran and the sampling methodology is two-stage random and cluster sampling method. the theoretical framework of the research is a combination of the theory of structural functionalism and the the...

There are some experiences that researcher come across quite number of time for very large networks in the initial samples such that they cannot finish the sampling procedure. Two solutions have been proposed and used by marine biologists which we discuss in this article: i) Adaptive cluster sampling based on order statistics with a stopping rule, ii) Restricted adaptive cluster sampling. Until...

Effective pedagogical practice promotes the achievement of students and builds up confidence of the teachers in teaching. The major cause for the gap in pedagogical practices can be attributed to the lack of pedagogical competence. The present study employed a mixed method research approach to examine Iranian high school English Language teachers’ perception of pedagogical competence in two pha...

the purpose of this study is determining the factors affecting timeliness of machine operation at different stages of sugar beet production. farm-level data were collected from a sample of 227 sugar beet farmer located in three major districts of farsprovince ofiran: eghleed, marvdasht and fasa, selected by a random sampling method during 2006. for this purpose, the probit model was used. the r...

Abstract:  The precision of conventional sampling designs is not usually satisfactory for estimating parameters of clump and rare populations. Many of fish species live in school and disperse all over a vast area like a sea so that they are rare compare to their habitats. Theory of a class of sampling designs called adaptive sampling designs has rapidly grown during last decade which solved the...