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Volume = cross sectional area * lengthArea = 2* cross sectional area + perimeter of cross section * length
Study designs for research tend to fall in two broad categories-descriptive or analytic. A cross sectional design is an ex of Descriptive study. It describes the occurrence of disease and disability in terms of person, place, and time using prevalence surveys, surveillance data, and other routinely collected data to describe a phenomena. Analytic designs explain etiology and causal associations. Ex) cohort or case control aim to estimate the strength of a relationship between an exposure and an outcome.
If the diameter doubles (x2), the cross-sectional area quadruples (x4).
Other things being equal, more cross-sectional area will cause less resistance.
9 AWG
advantage of cross sectional study?
Cross-sectional research design allows for data collection at a single point in time, providing a snapshot of a population's characteristics. It is relatively quick and cost-effective compared to longitudinal studies. It can identify correlations between variables and is useful for generating hypotheses for further investigation.
cross sectional study
Cross sectional
Yes, We can design a cross sectional study which its data collected in a retrospective format, so this study is called cross sectional retrospective study.
Cross-sectional design involves studying different groups of individuals at a single point in time, whereas cross-sequential design combines both cross-sectional and longitudinal elements by studying different age groups over a period of time. Cross-sectional design allows for quick and easy comparisons between different age groups, while cross-sequential design allows researchers to track the same individuals as they age.
cohort-sequential
The advantage of cross sectional studies is that they are simple, quick, and very affordable to conduct. As a disadvantage, the results of cross sectional studies may be difficult to assess where different participants are used at different levels of an investigation.
The advantage of cross sectional studies is that they are simple, quick, and very affordable to conduct. As a disadvantage, the results of cross sectional studies may be difficult to assess where different participants are used at different levels of an investigation.
Cross sectional
A cross-sectional design does not control for cohort effects because it involves studying different age groups at the same point in time, making it difficult to separate age effects from cohort effects.
Cross sequential studies combine both longitudinal and cross sectional methods in an attempt to both shorten the length of the research and minimize developmental assumptions