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What are the external costs and external benefits associated with cellular phone usage in automobiles?
Manipulated
In research, refers to the deliberate alteration or control of variables to determine their effects on other variables.
Specific Research Question
A narrowly focused question that guides a research study, aiming to address a particular aspect of a topic in depth.
Research Hypothesis
A testable prediction about the relationship between two or more variables, forming the foundation for empirical investigation.
Testable Hypothesis
A clearly formulated hypothesis that can be tested through scientific methods, allowing for empirical verification or falsification.
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