The number of bins in this histogram (caffeine content in mg/oz for 65 soft drinks)is consistent with Sturges' Rule. 
Definitions:
Substance Abuse
The harmful or hazardous use of psychoactive substances, including alcohol and illicit drugs.
Substance Dependence
A condition marked by a physical or psychological need to continuously use a substance despite adverse consequences.
Compliance
The act of conforming to or following rules, standards, or laws.
Harm Reduction
Strategies and approaches aimed at reducing the negative consequences associated with certain human behaviors, notably those that pose health risks.
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