Multiple Choice
To assess the effectiveness of the flu vaccine for county residents,Mr.McCallum wants to administer vaccine injections to all county residents rather than give half of them a placebo injection.Mr.McCallum is most clearly underestimating the importance of
A) testing a large sample.
B) operationally defining his procedures.
C) replicating observations of other researchers.
D) creating a control group.
Correct Answer:
Verified
Correct Answer:
Verified
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