To Assess the Effectiveness of Flu Vaccine for County Residents,Mr

question 129

Multiple Choice

To assess the effectiveness of flu vaccine for county residents,Mr.Carlson wants to administer vaccine injections to all county residents rather than give half of them a placebo injection.Mr.Carlson 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.

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