Randomization is one way researchers can control for extraneous variables.
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Q8: Participants in trials of an experimental intervention
Q9: A researcher wants to see if increased
Q10: A study designed to investigate an increase
Q11: A research assistant takes a survey of
Q12: An epidemiological research study about influenza that
Q14: A researcher would use between-groups design to
Q15: Allowing study participants to choose which study
Q16: A longitudinal design can often determine cause
Q17: Informing prospective study participants that random assignment
Q18: A researcher is designing an experiment to
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