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A graph showing exponential growth is concave up.
Random Assignment
A method used in experimental designs to randomly allocate subjects to different treatment groups, ensuring that each group is likely to be similar before treatment.
Treatment Groups
Groups in an experiment that receive the experimental treatment or intervention, whose outcomes are compared to a control group.
Factorial Design
A type of experimental design that allows researchers to examine the effects of two or more variables simultaneously by changing them together instead of independently.
Independent Variables
Factors deliberately manipulated by researchers to investigate their effect on dependent variables.
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