Imagine that all members of your class have been tested to determine the level of the serotonin metabolite 5-HIAA in their cerebrospinal fluid. Which of the following would you predict using this information?
a. Male classmates with low 5-HIAA levels are unlikely to be alive ten years from now.
b. Low 5-HIAA levels will be associated with good exam performance.
c. High 5-HIAA levels will be associated with poor sleep patterns in males.
d. Male classmates with high 5-HIAA levels will not be alive ten years from now.
e. Those with low 5-HIAA levels will be the thinnest persons in the class.
Answer: a. Male classmates with low 5-HIAA levels are unlikely to be alive ten years from now.
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