Multiple Choice
Suppose someone finds that people who drank coffee got less sleep than those who didn't.To know whether this statement came from an experiment or a correlation,which question should we ask?
A) Were people randomly assigned to two groups, or did they decide for themselves?
B) Was this the result for just one night, or the average over several nights?
C) In what way did the researchers measure the amount of sleep?
D) How large was the difference between the two groups?
Correct Answer:
Verified
Correct Answer:
Verified
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