In a cross-sectional design, researchers study __________. the same group of participants repeatedly at different ages groups of
participants differing in age at the same point in time groups of participants of the same age in different years participants of the same age at the same point in time
groups of participants differing in age at the same point in time
Explanation:
Cross-sectional design: This is a type of observational study design. In this study, the investigator calculate the exposures and the outcome in study participants at the same time.
The research involves different groups of people who have different variables of interest but consists of other characteristics, for example, educational background, socioeconomic status, and ethnicity.
The Joint Doctrine contains fundamental principles that serves as a guide to the employment of US armed and military forces and endorses a coordinated and integrated action towards a common objective such as planning, training, tactics, techniques and conducting military operations.
One of the important purpose of Joint Doctrine is to increase operational effectiveness of U.S. armed forces. It represents what is taught, believed, and advocated as to what is right.
