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Which of the following best illustrates a "double blind” study?
A study in which neither the participants nor the researchers are familiar with the hypothesis.
A study in which neither the participants nor the researchers know which participants are in which group.
O A study in which both control and the experimental group participants are unsure which group they are in.
A study in which participants are not tracked and researchers determine who was in which group based on results.


Sagot :

Answer:

b

Explanation:

not sure how to explain.