SOLUTION: Which is generally the more reliable data-gathering tool: a survey or a randomized comparative experiment? Explain your reasoning. please help me and thanks in advance

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Question 891707: Which is generally the more reliable data-gathering tool: a survey or a randomized comparative experiment? Explain your reasoning.
please help me and thanks in advance

Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
A randomized comparative experiment.
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The problem with surveys is compliance. Usually the people who will respond are those with strong positive or negative feelings.
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There's an excellent response to the problem of surveys here.