BACKGROUND Nonrandom sampling of populations in developing nations has limitations and can inaccurately estimate health phenomena, especially among hard-to-reach populations such as rural residents. However, random sampling of rural populations in developing nations can be challenged by incomplete enumeration of the base population. METHODS We describe a stratified random sampling method usin...

The understanding of the behavioural aspects of a software system is an important enabler for many reverse engineering activities. The behaviour of software is typically represented in the form of execution traces. Traces, however, can be overwhelmingly large. To reduce their size, sampling techniques, especially the ones based on random sampling, have been extensively used. Random sampling, ho...

the rural tourism as the most popular forms of tourism can be regarded as a policy to reduce the problems of rural areas. rural tourism, is a risk factor for the development of rural areas, including most the effects of its population stable, solve unemployment, reduced migration and more. this study aimed to detection effects of tourism in myshkhas rural center development in ilam province. a ...

a number of 1810 members of the water user associations (wuas) of jarghouyeh district consisted the statistical population of the study, out of which 150 farmers were selected as sample using proportionate stratified random sampling technique. a questionnaire was developed for gathering the data and information. content validity and cronbach alpha proved both the validity and reliability of the...

Background and aim Postpartum is a critical period for mothers which often leads to neglect of their own health. Mothers' new responsibilities may affect their health promoting lifestyle (HPL). The aim of this study was to determine the impact of both general health and social support on health-promoting lifestyle. Methods A cross-sectional survey was conducted on 310 women who gave birth ove...

BACKGROUND The purpose of this study was to estimate the bias and design effects associated with the Expanded Program on Immunization's (EPI) sampling design when estimating xerophthalmia prevalence, and to estimate the savings associated with EPI in terms of distance travelled within selected clusters. METHODS Computer simulation of the EPI sampling strategy was done using maps from a xeroph...

breakeven analysis is one of the most important existent tools for decision-making in agriculture. this technique used for analysis of different budget components about irrigated wheat crop in marvdasht township. the required data and information were collected via 154 questionnaires and using the stratified random sampling method during 2004-2005. results show that farmer's profit (rls. 4...

the purpose of this study was to determine students’ attitudes toward international agricultural issues. the population for the study consisted of agricultural extension students at tehran and shiraz universities, agriculture and natural resources colleges’ (n= 170). a stratified random sampling technique was employed to select samples, (n= 120). the study was conducted during the fall 2007 usi...

This work explores the use of statistical techniques, namely stratified sampling and cluster analysis, as powerful tools for deriving traffic properties at the flow level. Our results show that the adequate selection of samples leads to significant improvements allowing further important statistical analysis. Although stratified sampling is a well-known technique, the way we classify the data p...

Flow-stratified sampling is a new method for sampling water quality constituents such as suspended sediment to estimate loads. As with selection-at-list-time (SALT) and time-stratified sampling, flow-stratified sampling is a statistical method requiring random sampling, and yielding unbiased estimates of load and variance. It can be used to estimate event yields or to estimate mean concentratio...