Examlex
Which of the following is not a measure of dispersion?
Observational Study
A type of research in which the investigator observes and records behavior or outcomes without manipulating the study environment or subjects.
Ethical Concern
Issues or situations that require careful consideration of principles of right and wrong in making decisions.
Placebo Drug Studies
Research studies that investigate the effect of a treatment, in which some participants receive a placebo, or inert substance, to compare against the effects of actual drugs.
Experimental Group
A group of subjects in an experiment who are exposed to the variable under investigation, used to determine the effect of a treatment or intervention.
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