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16 September, 19:10

Why do we need to conduct an experiment to determine if therapy is effective?

a. different people say different things in a survey.

b. the correlation is too close to zero.

c. some people prefer some therapies and other people prefer different therapies.

d. conducting an experiment is the only way to determine causality?

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  1. 16 September, 19:15
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    I believe C is the answer.
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