Q Search this courseG 2 QUIZ Save Submit Assignment for Grad tions Question 10 o

Question

Q Search this courseG 2 QUIZ Save Submit Assignment for Grad tions Question 10 of 29 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, whi question should we ask? O a. Were people randomly assigned to two groups, or did they decide for themselves? O b. How large was the difference between the two groups? O c. Was this the result for just one night, or the average over several nights? d. In what way did the researchers measure the amount of sleep? cBoo

Explanation / Answer

The correct answer is Option A. If we find out whether people were assigned randomly to groups or not, we can correctly guess whether the study was an experiment or correlation.

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