A friend wants to explore age differences in happiness for her ph.d. thesis. she should most likely conduct a Cross sectional study, because it will demand less time than the other types of study.
An observational research method known as a cross-sectional study examines data on variables that were gathered at one specific moment across a sample population or a pre-defined subgroup.
Cross-sectional analysis study can also be called transverse study, or prevalence study. Although cross-sectional research does not involve conducting experiments, researchers often use it to understand outcomes in the physical and social sciences and many business industries.
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