Random assignment is used to ensure that a sample is representative of the population from which it is drawn.
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Q3: An unobtrusive measure assesses behaviour without participants
Q4: The optimum operational definition for exam stress
Q5: The problem in which we can't tell
Q6: A hypothesis is a tentative explanation or
Q7: A major disadvantage of correlational research is
Q9: Case studies enable us to make better
Q10: All other things being equal, a simpler
Q11: In both correlational research and experimental research,
Q12: In an experiment, the independent variable is
Q13: Researchers often manipulate more than one independent
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