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27 May, 06:10

Some research questions cannot be answered using human experiments because

a. some studies would be impractical or unethical.

b. randomization is often hard to achieve.

c. double-blind studies are usually dangerous to participants.

d. researchers know that their results usually will not be published.

e. they are not a very effective way to learn about cause and effect relationships.

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Answers (1)
  1. 27 May, 06:34
    0
    B.

    randomization is often hard to achieve.
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