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The substance serotonin is most closely associated with a good night's sleep.
Combinations
A method of counting that determines the number of possible arrangements in a collection without regard to the order of the elements.
Experimental Outcomes
Possible results or occurrences that can happen in an experiment, each outcome having a certain probability of occurring.
Objects
Entities, real or abstract, about which data can be collected and analyzed in various contexts, including programming, mathematics, and everyday situations.
Mutually Exclusive Events
Events that have no sample points in common; that is, A ∩ B is empty and P(A ∩ B) = 0.
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