Get flash to fully experience Pearltrees
In statistics , quality assurance , and survey methodology , sampling is concerned with the selection of a subset of individuals from within a statistical population to estimate characteristics of the whole population. Acceptance sampling is used to determine if a production lot of material meets the governing specifications . Two advantages of sampling are that the cost is lower and data collection is faster than measuring the entire population. Each observation measures one or more properties (such as weight, location, color) of observable bodies distinguished as independent objects or individuals. In survey sampling , weights can be applied to the data to adjust for the sample design, particularly stratified sampling ( blocking ).
The EQUATOR Network resources enable: Better reporting Better reviewing Better editing The EQUATOR Network Resource Centre provides up-to-date resources related to health research reporting mainly for: authors of research articles journal editors and peer reviewers reporting guideline developers Other users that benefit from the knowledge of principles of good research reporting include representatives of research funders, research ethics committee members, individuals and organisations involved in research education. The resources on our website are regularly updated (see the date of the last update at the foot of each page).
The worldwide incidence of preterm birth: a systematic review of maternal mortality and morbidity Incidence mondiale de la naissance avant terme : revue systématique de la mortalité et de la morbidité maternelle Incidencia mundial de parto prematuro: revisión sistemática de la morbilidad y mortalidad maternas Stacy Beck I ; Daniel Wojdyla II ; Lale Say III, * ; Ana Pilar Betran III ; Mario Merialdi III ; Jennifer Harris Requejo IV ; Craig Rubens V ; Ramkumar Menon VI ; Paul FA Van Look VII
Critical Appraisal of Studies 1. Study Design and Sampling Method: Are the study design and sampling method appropriate for the research question?
Background Understanding the prevalence of schizophrenia has important implications for both health service planning and risk factor epidemiology. The aims of this review are to systematically identify and collate studies describing the prevalence of schizophrenia, to summarize the findings of these studies, and to explore selected factors that may influence prevalence estimates.