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Experimental Group
The group in a scientific experiment that receives the treatment or intervention under study to assess its effect compared to a control group.
Population
The total number of individuals or entities within a specified area or group which could be studied or observed.
Internal Validity
The characteristic of a study that allows us to conclude that the manipulation of the independent variable caused the observed changes in the dependent variable.
Independent Variable
The variable in an experiment that is manipulated by the researcher to examine its impact on the dependent variable.
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