The results of a mathematics placement exam at two different campuses of Mercy College follow: 
What is the null hypothesis if we want to test the hypothesis that the mean score on Campus 1 is higher than on Campus 2?
Definitions:
Operant Conditioning
A strategy for learning that shapes behavior through the offering of rewards or the application of detractions.
Systematic Desensitization
A behavioral therapy technique aimed at reducing a subject's response to a phobia or anxiety-provoking stimulus by gradually exposing them to the stimulus in a controlled manner.
Token Economy
A reinforcement-based system where tokens are given as rewards for desired behaviors, which can be exchanged for specific privileges or items.
Meta-Analysis
A statistical technique for combining data from multiple studies to derive conclusions about the data pool as a whole.
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