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...

objective: we aimed at designing a cross sectional study to investigate the prevalence of psychiatric disorders in iranian children and adolescents and to determine its relationship with social capital, life style, and parents' personality disorders. method: this cross sectional study was a national project implemented in all provinces of iran. in this community-based study, using ‎multistage c...

Studnicki M., Mądry W., Schmidt J. (2013): Comparing the efficiency of sampling strategies to establish a representative in the phenotypic-based genetic diversity core collection of orchardgrass (Dactylis glomerata L.). Czech J. Genet. Plant Breed., 49: 36–47. Establishing a core collection that represents the genetic diversity of the entire collection with a minimum loss of its original divers...

objective: this article presents an application of cluster analysis for social sciences researches especially those studies that have an interview as part of their data collection. this application is more suitable for sequential mixed method researchers who use quantitative data to frame subsequent qualitative subsamples for conducting interviews.  methods: in more detail, the algorithm (i.e.,...

The present study investigated the relationship between demographic characteristics and marital life skills of the young Iranian clients using descriptive-survey method in 2017. The studied population was all young married people in Shiraz. The sample included 384 individuals who were selected by cluster sampling method. Data was measured by a researcher-made questionnaire. Data were analyzed u...